Answer: C
Step-by-step explanation:
The triangle in the picture is an equilateral triangle. We know this is true because all sides are equal, as denoted by the tick marks. In equilateral triangles, each angle is 60° because when you add all the angles, you get 180°.
4x+8=60 [subtract both sides by 8]
4x=52 [divide both sides by 4]
x=13
Now, we know that C is the correct answer.
