An Adventitious Angle

★ 8/10plane geometry Inscribed Angle Reflection Triangle Geometry

Problem

In $\triangle ABC$ , $AB=AC$ , and a point $P$ satisfies

\angle BAP=20^\circ,\qquad \angle ABP=10^\circ,\qquad \angle PAC=60^\circ.

Find $\angle APC$ .

Answer

Solution

Difficulty	8/10
Topics	plane geometry, Inscribed Angle, Reflection, Triangle Geometry

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