Question

What’s the value of x in each triangle?

Answer 1

The value of x is 70°.

Explanation:

Let's name the angle to the right of 125° as 'y'.

y = 180 - 125 (linear pair)

y = 55°

Now, we know that all the angles in a triangle sum up to 180°. (Angle Sum Property)

x = 180 - (55+55)

x = 180 - 110

x = 70°