LINES AND ANGLES | Concept and Important Questions | Chapter 06 |Class 09 CBSE EXAM 2024 | Exam Edge
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- เผยแพร่เมื่อ 19 ก.ย. 2024
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Mam easy trick to find angles in parallel lines is
1. Corresponding angles - F
2. Alternative angles - Z
3. Co-interior angle - C
Thanku maam for this session❤❤
I got 27/30
Homework:
PQ||ST
Angle PQR=110*
Angle RST=130*
Prove=angle QRS=?
Construction:draw a line MN through point R||ST
Therefore MN||pQ
Proof:
Angle TSR+angle SRN=180(angles on the same side of Transvarsal are supplementry )
130+angle SRN#=180
Angle SRN=50*
PQ||MN
Therefore angle PQR=angle QRN(alt۔interiorangles)
110*=angle QRS+angle SRN
110*=angle QRS+50*
110*-50*=angel QRS
60*=angle QRS
Thank You So Much Mam for the Session. It was really amazing😄❣💫
🔺HOMEWORK ANSWER🔻
Construct a line A || ST
Now-
∠SRA + ∠TSR = 180° (Co interior angles)
∠SRA + 130° = 180°
∠SRA = 50°
∠PQR = ∠QRA (Alternate Interior Angles)
110°= ∠QRA
∠QRA = ∠QRS + ∠ SRA (Given)
110° = ∠QRS + 50° ====> ∠QRS = 60°
My Score was 29/30😊
Byjus this is a humble request to give revision like this for rest of the chapters also which are coming in second term because this is really helpful.
Homework question (Ansh) ,
Given: PQ || ST , RST =130, PQR 110
Find: QRS
Construct: line R TO E (right side)
let extent angle R to E so ,
TSR +SRE = 180 (CO-INTEROR)
130 + X = 180
X = 50
NOW,
POR = QRE (ALTERNATE INTERIOR ANGLE)
110 = QRE
SO, QRE - SRE = QRS
110-50 = QRS
60 = QRS answer
The ans of hw question is angle QRS=80° and I got 30 on 30 🔥🔥🔥
Your homework answer is wrong the correct answer is 60°
Jhootha homework question wrong Kiya hai Gyan pel Raha hai 30 on 30
Thank you mam for this wonderful session 😀
I GOT ALL THESE QUESTIONS CORRECT....30/30
🔴🔴🔴🔴home work construction Lllpq
THERFORE LllST
ANGLE PQR+ANGLE 2=180(CO-INTERIOR ANGLE)
110+ANGLE 2=180
ANGLE 2=70
ANGLE TSR+ANGLE 1=180(CO-INTERIOR)
130+ANGLE 1=180
ANGLE 1=50
ANGLE 1+ANGLE 2+ANGLE QRS=180(FORMS A STRAIGHT ANGLE =180)
70+50+QRS=180
ANGLE QRS=180-120=60 ANS
Same side of transerval line called corresponding angle
Ma'am, this session really helped me to get all my concepts Clear .
I scored 28/30
Homework answer-
PQ ll ST
PQR = 110
RST = 130
PQR + QRX = 180
110 + QRX = 180
Hence, QRX = 70
RST + SRY = 180
SRY = 180 - 130
SRY = 50 ( straight line)
QRX + QRS + SRY = 180
70 + QRS + 50 = 180
QRS + 120 = 180
QRS = 180 - 120
Therefore, QRS = 60
Co interior angle same side of transerval angle
Construct a line A || ST
Now-
∠SRA + ∠TSR = 180° (Co interior angles)
∠SRA + 130° = 180°
∠SRA = 50°
∠PQR = ∠QRA (Alternate Interior Angles)
110°= ∠QRA
∠QRA = ∠QRS + ∠ SRA (Given)
110° = ∠QRS + 50° ====> ∠QRS = 60°
i got 29/30
Thank 🙏🙂 You so much mam, it was a Amazing 😍 Session, i really enjoyed it .
Lines and Angles is one of the my favorite 😍 Chapter.
By the way i got 26/30( Due to silly mistake in 2nd last question 😝 Although i knew the answer 😅)
Homework :-
By Constructing a line (AB) such that parallel to PQ and ST and passes through R ,
Then by Co interior angles ARQ =70° and similarly by co interior angels BRS = 50°
Then angles ARQ+ QRS+SRB=180°
70+QRS +50=180° (Form a line)
So angle QRS = 60° ans
Thank 🙏 you so much mam once again.🙂
25:14 first question started here
4:51 chapter start angle
Selection A) 3 right
Mam my byjus app is not opening
Cc crystal clear
Thanks for the session 😊❤
maam i scored 30/30
and the ans of hw ques is 60 dige
and i like the session very much
thank you.
Is this for grade 10??
No
Homework Problem Answer:-
Since PQ || ST [Given]
and EF || ST [Construction]
∴ PQ || EF and QR is a transversal
⇒ ∠PQR = ∠QRF [Alternate interior angles] But ∠PQR = 110° [Given]
∴∠QRF = ∠QRS + ∠SRF = 110° …(1)
Again ST || EF and RS is a transversal
∴ ∠RST + ∠SRF = 180° [Co-interior angles] or 130° + ∠SRF = 180°
⇒ ∠SRF = 180° - 130° = 50°
Now, from (1), we have ∠QRS + 50° = 110°
⇒ ∠QRS = 110° - 50° = 60°
Thus, ∠QRS = 60°
Mam I scored 30/30
Two non-collinear rays
Straight angle
Thanks for the session mam😄 all these questions and their solutions are helpful!!
i got all these question correct...28/28
🔴HOMEWORK-
after construction of another parallel line ab to line pq ...
we will get qra=70....we know that angle ars=rst(since alternate opposite angle)
70+qrs=130....thus angle qrs=60 degree
Hi
@@astha-- where are you from ?
I'm from NCR
@@A69555 uttar pradesh
B
mam thank you for giving ius these useful hours ✨✨😊🙏🏻
First comment
Hello Ma'am
The session was very helpful !!! I got 30/30 marks .
Answer to the H.W Question is 60 degrees
🛑 HOMEWORK ANSWER:-
PQ//ST
Mam session was amazing all topics are crystal clear . My score is 27/30 ,and mam the ans of the question is 60degree
Wonderful and very fruitful session
My score is 27/30
Homework answer is 60 degree
Mam can explain question 8
Mam Make video on class 9 maths ch 1 to 6 all in one revision marathon notes,theory,question, mcq,imp question, pyqs
Thank you soo much ma'am for the wonderful session .... It was amazing and helpful .... ❤😊🦋🌈
------Homework answer-------------
Construct a line ....
Noww -
Thanks mam for this wonderful session 😀✨ All the concepts are cc.
MY Score : 30/30
ANSWER OF HW QUESTION 👇🏻
PQ||ST
Angle PQR= 110°
Angle RST = 130°
1 questions (c)
Right angle
Reflex
Which will cross
Acute angle
The ans for the homework question is 60°. My score is 29 / 30
Right
1. C
3 and 7
Hello
Mam
My score in 29 on 30
💜❤️💜❤️💜
Straight
100
hi mam
❤❤❤❤
The more like this comment gets the more push up i will do
I want a proof of that 🤡
Padh le😂
Padhne likhne mein dhyan lagao ias bano
.
180degree
Obtuse angle
All time slots🖋️
25:14 first section
38:43 second section
1:13:32 third section
1:20:25 hw question
1:20:41 thank you
Angle QRS = 60 Degree
😅
Cc
My exam is today annual
180°
My math exam is March 1st week
Baishnabi
QRS = 60°
hi
4,5
180•
26/30
360°
He 😊😊😊😊
1 2
Nhi
Hello
100
Dddd🎉🎉🎉🎉
. .
Muh me donga homework done
Z banata hai vo
Cc
Ddddd
1 acute🥃
2 right।.... 🥂
3obtuse....❤
4 straight🙃
5 reflex🙂
6 complete.... 💍
Obtuse
Mam.. mein jis bekar school mein padhti hnu na.. usme inmese agar ek bhi question wo khadus maths teacher mujhe dede toh mein khush ho jaaun.. matlab woh kuchi bhi questions puch leti exam mein.. 😭😭😭😭😭😭😭
Next year change school
Right
360
2,5
Cc
Cc