We will have to take the under root of the RHS in that case, I believe, it might apply to this current situation that we have (I have forgotten what it is), but it should be d = [(x-x2)^2 + (y-y2)^2]^1/2
@idster7 Of course x and y aren't 0. They're not even on the function. You're assigning two values. In a x-y function one variable is dependent upon another. So if y=x+1, you can't say because x is 0 and y is 0 the function wouldn't work.
Hey Sal, thanks for the video! :) If you hold shift on the keyboard while drawing shapes it will keep the shape uniform, i.e. you can only draw circles, or squares depending on the tool you use. :)
i think this is the first of a hundred sal videos i've watched that i haven't really gotten. i don't understand the equation x-squared plus y-squared equals 9. how could x be 0 and y be 0? that wouldn't equal 9.
Can someone please tell me the center of the last circle spoken about because my sound doesn't work and i cannot make heads or tails of this without the sound
how to determine the equation of a circle passing thru different points? I know the point has to be substituted in the standard form but I don't know how to continue solving after substitution. I need help :(
i love 6:00 because this guy actually takes us the time to explain why its not (-1,2). the text book just tells us how to do it, not why reversing the sign on the values works.
it means the circle's center is not in the origin (0,0) since h stands for the x coordinate and k stands for the y coordinate, therefore that (x-h)^2 + (y-k)^2 =r^2 means a circle with the center at (h,k)
Khanic sections.
beautiful
iconic
@@nityanunna8828 ikhanic
Any stem student here?😂
g 11 shs? pre cal?
Here
yoo
Heey
🤣🤣 here
this guy is probably an engineer: "It's supposed to be centered at zero, but that's good enough"
Oh my gosh I'm reviewing for my final and this is so helpful to refresh my memory. I'm so glad I found this is very helpful!!!
Hope you did well
How did the center turn into positive 1 and negative 2 while inside the equation it is vice versa
Where is this video on Khan Academy? It doesn't seem to be in the Conic Sections category of Algebra 2 under Circles.
It is in Algebra playlist
man i got to say you have saved my ass in for college
8:42 If the formula of the circle is C: (X - Xo)^2 + (Y - Yo)^2 = r^2 then the center's coordinates are (Xo, Yo)
Hahahaha "And you'd be almost right except you'd be exactly, uh, the opposite of the correct answer" Sal is hilarious
Best video ever, totally prepared me 😉
I only wish this cane out last year when I had to do this. :(
Hi what app did you use for your video?
How does (X-1) ^2 + (Y+2)^2 = 3^2 and its center is (1,-2) ?? Is it given to change the sign??
I thought it was (1,4) lol hahaha
the sign should be change when you're going to plotnit
what software you use please answer asap...
Distance formula -> (x-x2)^2 + (y-y2)^2 = r^2. If x2 = 1 and y2 = -2, you get (x-1)^2 + (y+2)^2 = r^2. Simple.
How about..
d= \|(x2-x1) + (y2-y1)
We will have to take the under root of the RHS in that case, I believe, it might apply to this current situation that we have (I have forgotten what it is), but it should be d = [(x-x2)^2 + (y-y2)^2]^1/2
Why was it *-1,2* tho
in the end as we wanted (y+2)=4
why couldn't the value of "y" be -4 ?
Because then you'd have -4+2 = 4
2=8
or
-2=4
...
why no audio
What is circle?
Thank you.
"you would be almost write , except you would be exactly opposite of the correct answer" ................................wha ? lol
+Cheyne Simons i laughed so hard when i heard that
Cheyne Simons it’s spelled right
😎🎖️🤩🏆☺️
anyone know how to graph it on a computer, or any program. Need it for a school assignment
Abdullah Sher i know that this is late, but for future reference i use a program called geogebra
He looks charming when he teach math😂
STEM PA MGA TANGA!!🤣🤣
anyone reviewing bc of quarantine?
Wen diameter is 9. Den how is the radius 3?
Rishal Tauro it isn't diameter that's 9. It's radius squared that's 9. You simply take under root of 9 to get radius. Which is 3
hiiiiiiiiiiiii
Hi jh loop
"You'd be almost right, but you'd be exactly the opposite of the correct answer"
XD
"Some Algebra classes like to complicate things by SHIFTING THE CIRCLE" Uhh...can someone say amen?
amen!
it would be nice if the calculations were a easy as just "shifting"
my math teach flies through the math lessons and i am soo glad to have found this guy, the things sal teaches just clicks in my head
"you'd be almost right except you'd be exactly opposite the right answer" lmao please never stop making vids
i honestly hate math
+MattTrainor your gonna have a bad time
Math is eveywhere... If you hate math have fun trying to get a well paid job
+Pratyush Srivastava become a singer, celeb, artist (a great one), or a TV show writer, typical thinking.
or run for president.
MattTrainor, then I honestly hate you.😡
Cause of Death: Math
im an IT student and idk what the heck im doing here
geez, i understand you more than i understand my math teacher.
THE BEEPING AGHHHHHHHHHHH I CANT TAKE IT
@idster7 Of course x and y aren't 0. They're not even on the function. You're assigning two values. In a x-y function one variable is dependent upon another. So if y=x+1, you can't say because x is 0 and y is 0 the function wouldn't work.
R we squared?
thank you so much i felt so left behind wheni had no idea about conic in my precalculus class...and so close to finals u really helped me out a lot :)
I used your videos to help me pass a test to take Calculus in freshman year.
11 years ago and still helpful. Thank you.
Anyone watching this because modules aren't enough to learn this lesson?
Hey Sal, thanks for the video! :)
If you hold shift on the keyboard while drawing shapes it will keep the shape uniform, i.e. you can only draw circles, or squares depending on the tool you use. :)
That video was fire!
You talk like the Doctor
i love your voice! ....and your teaching of course ahaha
this is so helpful!! I'm studying for my ACT and your videos are a life saver for geometry!
For the formula at 0:40 couldn't the formula be simplified by taking out the squared EX: x+y=r instead of all those squared's?
STIX you cannot cut the squares unless it is (x+y)^2 = r^2
Can't understand anything huhu
aside from the wheel, what are other real world applications of the circle?
Trigonometry
October 5 na bukas welp
This helps me a lot 👏
Yow stem pss
Student*
i think this is the first of a hundred sal videos i've watched that i haven't really gotten. i don't understand the equation x-squared plus y-squared equals 9. how could x be 0 and y be 0? that wouldn't equal 9.
Can someone please tell me the center of the last circle spoken about because my sound doesn't work and i cannot make heads or tails of this without the sound
Ah, x^2 + y^2 = 1 is a circle with radius 1, becomes pretty obvious once you see it from the trigonometric unit circle since cos^2 x + sin^2 x = 1 :D
how to determine the equation of a circle passing thru different points? I know the point has to be substituted in the standard form but I don't know how to continue solving after substitution. I need help :(
i love 6:00 because this guy actually takes us the time to explain why its not (-1,2). the text book just tells us how to do it, not why reversing the sign on the values works.
I hate Pre-Calculus.
Hey, do you use a mouse or like a pen to write this stuff out? An electric pen of course..
how about the world as an infinite amount of circles (actually ellipsoids) turned around the rotation pole?
Sal !!! iam ready to challenge you that you could make it much more shorter !!!!
13 years ago still helpful.
I have a exam tomorrow so i need to watch this.
khan academy is goat
Well it is a low level explanation
translation of a circle ....
What about his back?
Get some friends.
Sal,
Your back!
thanks bro
THANKS
*you're
3:08
why is the standard form of the equation of a circle written in my book is (x-h)²+(y-k)²?
Just Me Again oo nga
it means the circle's center is not in the origin (0,0) since h stands for the x coordinate and k stands for the y coordinate, therefore that (x-h)^2 + (y-k)^2 =r^2 means a circle with the center at (h,k)
his back?
No, his front.
1st comment!!
awesome video
@dnmn8r
Was just gonna comment that...