Question

What is the value of y?

Answer 1

Answer:

C. 54°

Step-by-step explanation:

We know: measures of angles in a triangle add up to 180°.

Therefore we have the equation:

$\gamma+\gamma+72^o=180^o$      subtract 72° from both sides

$2\gamma=108^o$       divide both sides by 2

$\gamma=54^o$