Answer
a) Angle bisectors and then perpendicular segments
b) Perpendicular bisectors of the sides
Work Step by Step
a) To draw the in-circle, it is first necessary to draw the angle bisectors. After the angle bisectors are drawn, perpendicular segments are drawn to find the in-circle.
b) The circumcircle of the triangle can be found by drawing in all of the perpendicular bisectors of the sides.