Steps : Draw a line segment AB = 5 cm long. Make an angle of 75˚ at ‘B’ draw perpendicular bisector of AB and angular bisector of B.
Mark 3.5 cm on the perpendicular bisector with O as centre and radius equal to OA or OB draw circum-circle. Mark 2.5 cm on AC from A. Join BD, it will intersect at P, with P as centre and PD as radius draw another circle.