Question

What is the value of x? A. 124 B. 112 C. 68 D. 62

Answer 1

C.) 68
Why?
a triangle has 180 degrees. 
The tics denote the sides being equal, which means the opposite angles are equal, too. To get the remaining subtract it from 180... 180- 2(56) =68 degrees

Answer 2

A triangle should add up to 180 degrees.
So subtract 56 from 180 and get 124. This is an isosceles triangle so 2 sides have the same degree, which would be the bottom 2 sides in this case so 124-56=68, the answer is x=68. You can check by adding them all up:56+56+68=180 so this is correct.