Construct the incircle of Δ RST in which RS = 6cm, ST 7 cm, RT
= 6.5 cm.
1: Draw a Δ RST with the given measurements.
2: Construct the angle bisector of any two angles (S and T) and let them meet at A(center of inscribed circle).
3: With A as an external point drop a perpendicular to any one of the sides to meet at D.
4: With A as center and AD as radius draw the circle this circle touches all the sides of the triangle.