The center of a triangle's "incircle" (the circle that fits perfectly inside triangle, just touching all sides)

It is where the "angle bisectors" (lines that split each corner's angle in half) meet.

Have a play with it below (drag the points A, B and C):

It is where the "angle bisectors" (lines that split each corner's angle in half) meet.

Have a play with it below (drag the points A, B and C):

See: Incircle of Triangle

Copyright © 2018 MathsIsFun.com