Question

(c) problem 18: (first taught in lesson 42)
find x.
128°
after you enter your answer press go.
x =

Explanation:

Step1: Find adjacent - interior angle

$180 - 128=52^{\circ}$

Step2: Use isosceles - triangle property

Since the triangle is isosceles (two equal - side markings), the angle opposite the other base angle is also $52^{\circ}$. So $x = 52$.

Answer:

$52$