Question

Draw two parallel lines l and m. Now draw a perpendicular on line l at point P, which when extended meets line m at point Q. Measure the angle formed by line m and line PQ.
What do you observe?

Answer 1

Step 1: Draw two parallel lines l and m.
Step 2: Draw a perpendicular on line l at point P.
Step 3: Extend this perpendicular to line m which meets at point Q.
Step 4: Measure the angle formed by line m and line PQ, which comes out to be 90°.