Chapter 6 – Lines and Angles Exercise 6.1

(Q 1) In fig 6.13, lines AB and CD intersect at O .If ∠AOC+∠BOE=70°and ∠BOD=40°, find ∠BOE and reflex ∠COE .

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NCERT Solutions Class 9 Maths Chapter 6 - Lines and Angles Exercise 6.1

(Q 2) In Fig. 6.14, lines XY and MN intersect at O. If ∠POY = 90° and a : b = 2 : 3, find c.

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NCERT Solutions Class 9 Maths Chapter 6 - Lines and Angles

(Q 3) In fig. 6.15, ∠PQR= ∠PRQ then prove that ∠PQS= ∠PRT

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NCERT Solutions Class 9 Maths Chapter 6 -

(Q 4) In fig 6.16, if x+y = w+z then prove that AOB is a line.

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NCERT Solutions Class 9 Maths Chapter 6

(Q 5) In fig 6.17, POQ is a line. Ray OR is perpendicular to line PQ. OS is another ray lying between rays OP and OR. Prove that ∠ROS=1/2 (∠QOS- ∠POS)

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NCERT Solutions Class 9 Maths

(Q 6) It is given that ∠ XYZ = 64° and XY is produced to point P. Draw a figure from the given information. If ray YQ bisects ∠ ZYP, find ∠ XYQ and reflex ∠QYP.

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NCERT Solutions
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