Question

Using ruler and compasses only, draw a right angle.

Answer 1

Steps of construction: 

1. Draw a line segment AB 

2. With center A and any radius draw arc which intersect AB at C. 

3. With center C and same radius draw an arc which intersects AB at C. 

4. With center D and same radius draw arc which intersect arc in (2) at E. 

5. With centers E and C and any radius, draw two arcs which intersect each other at F. 

6. Join FA 

∠FAB = 90^o