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(NCERT, Pg- 97, Exercise – 5.5) (First one is done for you as an example)


           Q1.    Which of the following are models for perpendicular lines?

                  (a) The adjacent edges of a table top.
                  (b) The lines of a railway track.

                  (c) The line segments forming the letter ‘L’.

                  (d) The letter V.
           Answer (a) :  The adjacent edges of a table top are perpendicular lines as they form a

                         right angle.



           Q2.    Let PQ be the perpendicular to the line segment XY. Let PQ and XY intersect in the
                  point A. What is the measure of ∠PAY?

           Answer : The measure of angle PAY is 90°.
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