One of the corners of an isosceles triangle is 140 degrees. Find the sides and corners.

From the condition we know that one of the angles of an isosceles triangle is 140 °.

In order to find the other two angles, let’s recall the property of angles at the base of an isosceles triangle.

An isosceles triangle is a triangle in which two sides are equal and, accordingly, two angles at the base are equal.

And the sum of all the angles of the triangle is 180 °.

Let’s find what is the sum of two angles at the base of the triangle:

180 – 140 = 40 °.

40 °: 2 = 20 ° equal angles at the base.

Answer: 20 ° angles at the base.