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Gnoma [55]
4 years ago
10

How do I solve for x?

Mathematics
1 answer:
Umnica [9.8K]4 years ago
7 0
The external angle is equal to the sum of the other 2 interior angles

basically 109=6x+21+2x
109=8x+21
minus 21 both sides
88=8x
11=x

x=11 degreees
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