Question

What is the measure of side YZ?

Answer 1

The green marking of the angles show that it is an equilateral triangle
So,in an equilateral triangle all sides are equal
=>YZ=15
Hope This helps u...!!

Answer 2

Since the triangle is equiangular, this means it is an equilateral triangle, which means all the sides are congruent. So YZ is 15.

:)