Question

Calculate the size of the missing angles using the following information:

Answer 1

Keeping in mind that an isosceles triangle, has two equal sides, and those twin sides stemming out of the vertex, make up two twin angles at the base, since the sum of all interior angles in a triangle is 180°, thus 180° - 66° is 114°, and each angle at the base takes half of that, check the picture below.