this is my 3rd time going to take my sc exams i understood this after 4 years..im so grateful to finally understand this..i have exams tomorrow..i hope i pass this time
@@pinkflamingo_ it was really good! No circle theorems came up on it but I bet that just means that P4 (which I’ve got tmrw) is packed with them. I made a few mistakes but I calculated the lowest I can get and it’s around a 85%, so I think it’s a guaranteed A :D
00:04 - Angles in the same segment are equal 01:51 - Circle theorems help determine angles and relationships within a circle. 03:35 - Cyclic quadrilateral theorem and tangent theorem explained 05:19 - Tangents from the same point are equal in length 06:58 - Find angle ABD and give reasons for answers 08:38 - Finding angles in a triangle and cyclic quadrilateral 10:25 - Using the alternate segment theorem to find angle BCF as 20 degrees 12:04 - Using circle theorems to find angle measurements.
Hey, was looking for a guide on circle theorems. Doing early GCSE and was really struggling with how to implement these rules. You've really saved me! Thank you so much!
Hii, Im 12 and did not understand alot of circle theorems in school cause I was sick, and now I have my maths exams tomorrow✋😭 Was panincking cause i couldnt find a good video until I came across this. TYSM you saved my life! Hope i pass my test lol!
yo literally me !! The one day that i was absent cause i was sick, the teacher gets done with like 5 theorems !!! i am panicking wish me luck people i have my Math exam tomorrow 😭 🤞
1: Angles in same segment are equal. 2:angles in a semicircle or on diameter is right angle mean 90°.3: the angle at the centre is twice the angle at the circumference.
Another way to calculate angle BCF in the second worked example is toagain observe ACD is 35 deg (isoceles triangle) and ACB is 90 deg (since AB is a diameter), so angle BCD is 125. This means that BAD is 55 deg (cycilc quadrilateral) so BAD is 20 deg (55 deg - 35 deg) as is BCF.
THANK YOU AGAIN! i think i’ve commented on ur videos before haha😂.but i never ever rlly understood circle theorems which is why i dropped marks on that section in my maths test. already 3 mins in and everything feels clearer. DON’T STOP WHAT YOU’RE DOING! THANK YOU SO MUCH!
I was having trouble recognizing angles in segments before this video. But this video cleared all my confusions regarding this topic. Great video. Even the examples taken were difficult and great, considering this video is made to help students.
Example 2: It's much easier: ACD = 35°; because the legs of the triangle are the same lenght ACB = 90°; same reason (Diameter) DCE = 35° (Last theorem) FCB = 180° - 35° - 35° - 90° = 20°
Have you an idea? How can I solve this problem, please? Given a square ABCD of side 10 cm, and using the corners as centers ,construct four quadrants with radius 10 cm each inside the square. The four arcs intersect at P,Q, R and S . Find the area enclosed by PQRS. Thank you so much .
11:54 is it not angles of the same segment? Isn't angle CAB and COB 58°? I'm so confused 😕😭 Or does it have to be on the circumference for the theorem (angles in the same segment) to apply?
Thank you dear for this great explanation. I have a question regarding work example 2. The opposite angle should equal in quadrilateral but in the example that was not true. Can you explain this confusion.
Thanks for sharing, although I am not sure it is really any simpler? There are often many ways to approach circle theorems questions. As long as you're clear it's all good!
There's this really ez way to answer the last question, I'm not sure if it will get you full marks though? you create an imaginary tangent that touches the circle at point B, then the radius (QB) makes a 90 deg angle with the tangent (theorem) and angle ACB = the angle made between the chord AB and the tangent (alternate segment theorem) = 40 deg angle ABO + 40 deg = 90 (cuz the radius makes a 90 deg angle with the tangent) angle ABO = 50 deg
best videos!!! but just one question, are there not 8 Theorems? the one that goes " the radius through a midpoint of a chord will bisect the chord at 90 degrees"
I’m 40 learning this stuff for fun now and this is stuff hs kids are learning. That’s awesome, do great things kiddos
I'm 14 and learning this at school, don't quite understand how this is fun 😭
@@f0xt3r11 ikr even my exams are due to start in 10 days and i still dont understand how now how funs that?
@@f0xt3r11im 14 and same
for. FUN?
@@The-Survivalist1 nah bro by "fun" i was being sarcastic i just revise watching sir @1stClassMaths
got my gcse tomorrow. thanks for the helpful video
fr
same good luck ahhhh
Frr
Same good luck 🤞
Got my GCSEs in an hour
These are way better than the theorems and how they’re presented in American texts. Nicely done.
and english
Im not suprised
My teacher always talked about angles "subtended"
You actually made me understand circle theorems thank uuu
this is my 3rd time going to take my sc exams i understood this after 4 years..im so grateful to finally understand this..i have exams tomorrow..i hope i pass this time
this explanation is better than teaching on a board...thank you so much ...God bless U🤩
Thanks!
Thank you very much for this! 💙
Honestly just an amazing video, thank you so much.
You're very welcome!
I have a mock exam today
I hope I pass because of your videos
Hope it went ok!
Did you pass?
Bro how it went?
Did you pass or not?
Omggggg my other name is also anjalaaaa.....it's js so rare to find someone with the same name🤩🤩🤩
i have a math test in 2 hours 😭
Bro😂😂😂 never do that again every thing should be in his time 🫡
So, how did it go?
What score did you get
I had a math test in 1988😊
Story of my life right here, watching TH-cam videos hours before a test.😮💨
i love this. i was so lost in circle thereoms but learnt it and could answer questions correctly thanks to you
i have my test in 20+ days, i dont understand a thing yet.
Got my iGCSE exams tomorrow at 10AM. 12 hours left. Thank you for this video, it’s super helpful! Let’s hope I crush this test :D
GL
how was it
@@pinkflamingo_90% chance she doesn’t respond 💀 they never do
@@pinkflamingo_ it was really good! No circle theorems came up on it but I bet that just means that P4 (which I’ve got tmrw) is packed with them. I made a few mistakes but I calculated the lowest I can get and it’s around a 85%, so I think it’s a guaranteed A :D
@@Jimmy-fr1ig defied the odds 🔥
Just wanted to say, as someone studying this from Brazil, your channel is an amazing gem, keep up the great work and thank you 🙏
from brazil is mad 😭🙏🙏
u play minecraft 😭🙏🏼@@DannyOF
@@azeemrazzaque9949 ????
@@azeemrazzaque9949 ???
I have igcse math exam tomorrow pray for me guys
Same😭
same, good luck !
same wish you the best
God bless you
Same 😢
So underrated tysm
No problem 😊
You've done what I thought I'd never do .....understanding the Circle cause I know it now oh my God 😢❤ I'm no longer afraid
00:04 - Angles in the same segment are equal
01:51 - Circle theorems help determine angles and relationships within a circle.
03:35 - Cyclic quadrilateral theorem and tangent theorem explained
05:19 - Tangents from the same point are equal in length
06:58 - Find angle ABD and give reasons for answers
08:38 - Finding angles in a triangle and cyclic quadrilateral
10:25 - Using the alternate segment theorem to find angle BCF as 20 degrees
12:04 - Using circle theorems to find angle measurements.
looking for this
@@mubarakelhalangi8903 it in the description
Very well presented - Thank you!
literal lifesaver oml 🙏
Danganronpaa
thank u so much man i watched hundreds of circle theorems lectures but i didnt get it till i watched ur video ur very talented
I was in a 2 hour class about circle theorems and this video helped me more than that class
My teacher just posted a four hour lecture about it, when this 14 minute video covers it all.
Watching this 2 hours before the exams 🕺🕺
howd it go?
Same here
real
Got my mocks in a week, I am currently surviving using these vids, wish me luck.
Good luck!
yo mines tmrw😭
got my gcse today wish me luck :)
Really like the way you teach. Thank you very very much.
You are welcome!
Watching this 5 hours before my exam wish me luck
how did it go?
ur so underrated!!! helped me understand so many topics in a a very short time. keep going ❤
Thank you! Will do!
Hey, was looking for a guide on circle theorems. Doing early GCSE and was really struggling with how to implement these rules. You've really saved me! Thank you so much!
Great to hear!
What a rich review of geometric
Relations. Thank you. 10:01 10:04
Smooth and refreshing.
69yo BSME, 30yrs away from calculations.
bro what the hell are you doing watching these
This is the best and the most thorough explanation of circle geometry wow .I understand a lot now😊
Glad to have helped :)
Thanx for putting all that stuff together in one video of reasonable length! Great job 👍
🙂👻
where were u my whole life !!! THANK U SOOOOOOOO MUCH 🤩😍😍
I've just been here. Where were you?
The day after tomorrow I'm writing ,,
Man your a life saver
Hii, Im 12 and did not understand alot of circle theorems in school cause I was sick, and now I have my maths exams tomorrow✋😭 Was panincking cause i couldnt find a good video until I came across this. TYSM you saved my life! Hope i pass my test lol!
Glad I could help!
doing circle theorem at 12???? i’m only doing it at 16 😂
yo literally me !!
The one day that i was absent cause i was sick, the teacher gets done with like 5 theorems !!! i am panicking wish me luck people i have my Math exam tomorrow 😭
🤞
Thank you so much sir.. you have helped me to understand circle theorem better 🙏
You are most welcome
1: Angles in same segment are equal. 2:angles in a semicircle or on diameter is right angle mean 90°.3: the angle at the centre is twice the angle at the circumference.
Another way to calculate angle BCF in the second worked example is toagain observe ACD is 35 deg (isoceles triangle) and ACB is 90 deg (since AB is a diameter), so angle BCD is 125. This means that BAD is 55 deg (cycilc quadrilateral) so BAD is 20 deg (55 deg - 35 deg) as is BCF.
You're helping me with a test in 1 hr 🙏
Fab video - so clear.... thanks... Helping daughter with GCSE maths!
THANK YOU AGAIN! i think i’ve commented on ur videos before haha😂.but i never ever rlly understood circle theorems which is why i dropped marks on that section in my maths test. already 3 mins in and everything feels clearer. DON’T STOP WHAT YOU’RE DOING! THANK YOU SO MUCH!
Very glad to hear this! I will keep making content don't worry! Thanks for commenting. :)
Excellent teaching. Simple and clear.
I was having trouble recognizing angles in segments before this video. But this video cleared all my confusions regarding this topic. Great video. Even the examples taken were difficult and great, considering this video is made to help students.
You're very welcome!
Such a good short summary of theorems❤❤
Imagine watching this an hour before the exams😂😅
Then you're either going to get there and not remember anything or you will remember everything.
your programme is useful to my mathematical life
My fav topic. Now I can attack it without fear🎉🎉🎉
Thank you so much
I really appreciate the use of different colors to explain the concept
Glad it was helpful!
this video explained the topic so well! i can actually understand it step by step, thank you so so much! 💜
Glad it was helpful!
This video is so helpful! Thank you so much! Keep up the good work :D
good luck to everyone watching 30 minutes before the exam
dont know if i will ever use this in my life but helpful for the test
Thanks for this. I can now help my son with his revision.
my mans doing gods work trustttt
your explanation and the way you deliver the idea is amazing, also love the amount of examples thank you.
Glad you liked it!
Thanks very much for your explanation and God bless you.
Top viewed video, pls reach 1 million
Watching this 1 hour before my exam 😀
Just started revising today. Got my exam tomorrow 😭
Same
bro i’m learning this whole unit at 11pm bc i was away on medical leave and my teacher won’t cut me any slack
this i actually fun lol im learning things that are gonna happen in like 4 years thanks for the help
Very best message video in my life ❤❤
Example 2: It's much easier:
ACD = 35°; because the legs of the triangle are the same lenght
ACB = 90°; same reason (Diameter)
DCE = 35° (Last theorem)
FCB = 180° - 35° - 35° - 90° = 20°
Thank you for the videos, sir.
If I may ask, what is the name of the app you can use to create your video?
Have you an idea? How can I solve this problem, please?
Given a square ABCD of side 10 cm, and using the corners as centers ,construct four quadrants with radius 10 cm each inside the square.
The four arcs intersect at P,Q, R and S .
Find the area enclosed by PQRS.
Thank you so much .
I'm watching this video 4 hours before the Edexcel IGCSE 9-1 Mathematics Higher tier
11:54 is it not angles of the same segment? Isn't angle CAB and COB 58°? I'm so confused 😕😭
Or does it have to be on the circumference for the theorem (angles in the same segment) to apply?
For the angles in the same segment they both need to be on the circumference. I think you worked this one out yourself :)
I have maths test next 10 min😭😭
Before this video I had great difficulty in understanding circle theorems.
National exams tomorrow, just watching for a memory refresh, already studied for like two weeks straight
So crystal clear concept
got p2 tmrw muchas gracias aficio esto es para vosotros siuuuuuuuuu
i love your videos please don't die
I promise, I will never die.
Thank you dear for this great explanation. I have a question regarding work example 2. The opposite angle should equal in quadrilateral but in the example that was not true. Can you explain this confusion.
Hi. If you rewatch the main theorem you will see I mention that the four corners must be on the circumference of the circle to be considered cyclic.
Thank you for the clear explanation!
great job
thanks a lot for the clarification, that was incredibly amazing
LIFE SAVIOUR , LIFE SAVIOURRRRRRRR
THANK YOU SO. MUCH
watching this an hour and 20 mins before my paper 1 gcse x
same
circle theorems is paper 2 and three lol
Excellent explanation
thanks this was very helpful👍
have my mid terms tmro this is the only topic i dont get hope this helps
8:07 The way I used is slightly simpler.
ACD = CAD = 35º
ADC = 180º - ACD - CAD = 110º
ADB = 90º
BDC = ADC - ADB = 20º
BCF = BDC = 20º
Thanks for sharing, although I am not sure it is really any simpler? There are often many ways to approach circle theorems questions. As long as you're clear it's all good!
There's this really ez way to answer the last question, I'm not sure if it will get you full marks though?
you create an imaginary tangent that touches the circle at point B, then the radius (QB) makes a 90 deg angle with the tangent (theorem)
and angle ACB = the angle made between the chord AB and the tangent (alternate segment theorem) = 40 deg
angle ABO + 40 deg = 90 (cuz the radius makes a 90 deg angle with the tangent)
angle ABO = 50 deg
Nice Information
You're never too old to learn mathematics.
Best teacher on god
Muchas gracias por tomarte la molestia de hacer este precioso video.
No problem!
I have a math exam tomorrow. Wish me good luck
How was ur exam?
Hello thank you so much. Is isoceles triangle's angle 35°?
Very useful. Thank you.
Thanks a lot professor I follow you from Algeria
You are very welcome
How do you make maths videos like this?
Thank you very much, l now get it and i am gonna ace my exams.
Congrats on 100k views!
Thanks for pointing this out! I hadn't realised. That's incredible!
Amazing video
Watching from Zambia
best videos!!! but just one question, are there not 8 Theorems? the one that goes " the radius through a midpoint of a chord will bisect the chord at 90 degrees"
Hi yes you're correct. This theorem is almost never used but you can find it in my proof of circle theorems video.
@@1stClassMaths ok thanks!!!
Thank your mind so much this video is sooo clear
11:04 why isn’t angle DAO = angle DCB even tho it is a cyclical quadrilateral
Opposite angles in a cyclic quadrilateral are not equal, they add to make 180°
Thank you very much!
It really helped thank you.
You're welcome!
Well explained sir.