Question

Find the value of x.

Answer 1

Should be 36!

180 is the starting number for all triangles problems like this

180-78-66=36

Answer 2

x = 36°

Explanation:

Sum of angles = 180°

66°+78°+x = 180°

144°+x = 180°

x = 180°-144°

x = 36°

Hope it helps!