Class 9 – Lines & Angles

Question 2: In Fig. 6.29, if AB || CD, CD || EF and y:z=3:7, find x. Question 1 Question 3

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Question 1: In Fig. 6.28, find the values of x and y and then show that AB || CD. Ex: 6.1 | Question 6 Question 2

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Question 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. Question 5 Ex: 6.2 | Question 1

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Question 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). Question 4 Question 6

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Question 4: In Fig.6.16, if x+y=w+z, then prove that AOB is a line. Question 3 Question 5

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Question 3: In Fig. 6.15, ∠PQR = ∠PRQ, then prove that ∠PQS = ∠PRT. Question 2 Question 4

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Question 2: In Fig. 6.14, lines XY and MN intersect at O. If ∠POY=90°and a:b=2:3, find c. Question 1 Question 3

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 Question 1: In Fig. 6.13, lines AB and CD intersect at O. If ∠ AOC + ∠ BOE = 70° and ∠ BOD = 40°, find ∠ BOE and reflex ∠ COE. Home Question 2

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Theorem 6.8: If a side of a triangle is produced, then the exterior angle so formed is equal to the sum of the two interior opposite angles. Theorem 6.7 Class 9 | Home

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Theorem 6.7: The sum of the angles of a triangle is 180º. Theorem 6.6 Theorem 6.8

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