Question

Find x
.
31°
aro
980
x =
미
6
?.

Answer 1

39

Explanation:

By linear pair angles and exterior angle theorems:

`x \degree + (180 - 98) \degree = 180 \degree - (31 + 28) \degree \\ \\ x \degree + 82 \degree = 180 \degree -59\degree \\ \\ x \degree + 82 \degree = 121\degree \\ \\ x \degree = 121\degree - 82 \degree\\ \\ x \degree = 39 \degree\\ \\ x = 39`