Question

Each of the two equal angles of an isosceles triangle is four times the third angle. Find the angles of the triangle.

Answer 1

Let the third angle be x. Then, the other two angles are 4x and 4x, respectively.

We know that, the sum of all three angles in a triangle is 180°

Hence, the three angles are 4x = 4 x 20° = 80°, 4x = 4 x 20° = 80° and x = 20°.