Traditional Culture Encyclopedia - Hotel accommodation - It is known that in triangle ABC, AB=AC, angle BAC= 100 degrees, P is a point on the bisector of angle C, and angle PBC= 10 degrees, and the degree of angle APB is found.

It is known that in triangle ABC, AB=AC, angle BAC= 100 degrees, P is a point on the bisector of angle C, and angle PBC= 10 degrees, and the degree of angle APB is found.

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