Explanation:
Sum of interior angles is always 180.
5) x + 40 + 37 = 180
x + 77 = 180
x = 180 - 77
x = 103
6) x + 41 + 72 = 180
x + 113 = 180
x = 180 - 113
x = 67
7) x + 137 + 28 = 180
x + 165 = 180
x = 180 - 165
x = 15
8) x + 84 + 52 = 180
x + 136 = 180
x = 180 - 136
x = 44
Answer:
1. 103
2. 67
3. 15
4. 44
subtracting the sum of two given angles from 180.
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