Answer:
x = 48
Step-by-step explanation:
sorry for the late response, I didnt get a notification for your message.
Since two sides of the triangle have the same length, we knows it's isosceles. This means we we will have two base angles with the same value. Since x is the angle in between both legs, we knows x is the vertex angle.
66 is a base angle, which means the other base will be 66 as well. And since the angles of a triangle always add up to 180,
180 = x + (66 + 66)
x = 48
