Answer:
170⁰
Explanation:
An isosceles triangle has two angles that are the same length. We can see from the figure that CD = DE. This means that the two angles at C and E must be equal to each other. Therefore, we can write:
(2x + 17)⁰ = (8x - 13)⁰
-6x = -30
x = 5⁰
The two angles are 5⁰ each
We also know that the sum of all the angles of a triangle is 180⁰.
180 - 5⁰ - 5⁰ = 170⁰