What have you read about the angles of isosceles triangles?

Will you apply the concepts related to triangles here?

Which properties of triangles have you read so far?

Draw the triangles and think which property of isosceles triangles will you apply here?

Which concept about isosceles triangle will you use here?

Which concept about isosceles triangles and exterior angles of triangles will you apply here?

Which do you know about the angles of isosceles triangles?

The exterior angle of a triangle is equal to the sum its two nonadjacent interior angles.

Which properties of triangles have you read so far?