Question

Take a point P on a line AB. Draw a line perpendicular to line AB at point P.

Answer 1

Step 1: Take a point P on the line AB.
Step 2: Place a ruler along the line.
Step 3: Slide the set square along the ruler and place it such that one end is at point P.
Step 4: Draw a line at point P along the other straight edge of the set square.