Answer:
7=40, 8=23, and 9=63
Explanation:
The key info to solve is that in a triangle there are 180 degrees
7) we add 82 and 58 and then subtract the total from 180 to find x
=82 + 58 = 140, and 180 - 140 = 40, so 40=x
We do the same for the rest
115 + 42 = 157, and 180 - 157 = 23, so 23=x
Wait whats that square in the triangle? It represents 90 degrees, a right angle!
so, 27 + 90(right angle) = 117, and 180 - 117 = 63, so 63=x