In an isosceles triangle, the apex angle is 86 degrees. What are the other angles equal to?

We know that in an isosceles triangle, the apex angle is 86 °. In order to find the angle at the base, let’s recall the theorem on the sum of the angles of a triangle and the properties of the angles at the base of an isosceles triangle.

The triangle sum theorem says that the sum of the angles of a triangle is 180 °.

In an isosceles triangle, the angles at the base are equal.

Let us first find the sum of the angles of the triangle at the base.

180 ° – 86 ° = 94 °.

We only have to divide the obtained values ​​by 2:

94 °: 2 = 47 ° base angle.