Question

Find the distance between the parallel lines l and m, using a set square.
(i) Figure
(ii) Figure

Answer 1

(i) Distance between l and m is 1.3 cm.

Place the ruler so that one of its measuring edges lies along the line l. Hold it with one hand. Now place a set square with one arm of the right angle coinciding with the edge of the ruler. Draw the line segment PM along the edge of the set square, as shown in the figure. Then, measure the distance (PM) between l and m, which will be equal to 1.3 cm.



(ii) Distance between l and m is 1 cm.

Place the ruler so that one of its measuring edges lies along the line l. Hold it with one hand. Now place a set square with one arm of the right angle coinciding with the edge of the ruler. Draw the line segment PM along the edge of the set square, as shown in figure. Then, measure the distance (PQ) between l and m as 1 cm.