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marissa [1.9K]
3 years ago
5

I don’t know how to find angle A

Mathematics
1 answer:
Cerrena [4.2K]3 years ago
5 0
Angle a = 60

given that all angles of a triangle added together must equal 180
x = -20
-20+80=60
do it again for the other angle measurement
60+60+40=180

therefore, angle A is 60°
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