Draw a line segment of length 8.6 cm. Bisect it and measure the length of each part.
Steps of construction:
1. Draw a line segment AB of 8.6 cm.
2. Keeping A as center and radius more than half of AB draw arcs on each side of AB.
3. Keeping B as center and the same radius draw arcs on each side of AB cutting the previous arcs at P and Q respectively.
4. Join the points P and Q which intersects AB at C.
Therefore AC = BC = 4.3 cm