Q24 of 113 Page 128

For Fig. 5.20, statements p and q are given below:


p : a and b are forming a linear pair.


q : a and b are forming a pair of adjacent angles.


Then,

Summation of a and b is 1800, hence they form a linear pair.


Angle a and b have a common vertex O and a common side OC. So they form a pair of adjacent angles.


So both p and q statements are true.

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In Fig. 5.19, ∠ROS is a right angle and ∠POR and ∠QOS are in the ratio 1 : 5. Then, ∠QOS measures

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Statements a and b are as given below:

a : If two lines intersect, then the vertically opposite angles are equal.


b : If a transversal intersects, two other lines, then the sum of two interior angles on the same side of the transversal is 180°.


Then

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