how we can draw the parallel rays using set-square.
Review your question again.
Set squares can not be used to draw a right angle.
What should be step 3 while drawing parallel lines using set squares? Step 1: Position an edge of the set square against a ruler and draw a line along one of the other edges. Step 2: Slide the set square into a new position while keeping the ruler fixed exactly at the same position.
How do we draw a square of area 8 square centimeters?