# The angle at the apex of an isosceles triangle is 80 degrees. Find the angle between the side and the bisector to the side.

August 24, 2021 | education

| An isosceles triangle is a triangle with equal sides. The angles at the base of the triangle are equal to each other. The bisector of a triangle bisects the angle. The sum of all the angles of a triangle is 180 °.

1. Let us determine what the degree measure of the angle at the base of an isosceles triangle is equal to.

(180 – 80) / 2 = 100/2 = 50 °.

2. Find the degree measure of the angle formed by one side and the bisector drawn to the other side.

50/2 = 25 °.

Answer: The degree measure of the angle is 25 °.

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