Skip to main content
OlympiadHQ

Browse · MATH

Print

jmc

geometry junior

Problem

The sides of triangle are tangent to a circle with center as shown. Given that and , find , in degrees.

problem
Solution
The circle with center is the incircle of . So, any segment from a vertex of the triangle to is an angle bisector.

The sum of the measures of the internal angles of a triangle is , so

Since bisects , we have .
Final answer
29^\circ