With the help of ruler and compasses only , construct an equilateral triangle.
Step 1. Draw a ray AB with suitable length. Suppose AB = 6 cm.
Step 2. Taking A as a centre construct an angle of measure at A.
Step 3. Similarly taking B as a centre construct an angle of measure at B.
Step 4. On measuring the each sides using ruler we can check that each sides is of . Therefore triangle obtained is a equilateral triangle.