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makkiz [27]
3 years ago
9

Will mark brainliest

Mathematics
1 answer:
Svetlanka [38]3 years ago
3 0

Answer:

20

Step-by-step explanation:

if you plug in 20, (20) x 3 = 60 + 10 = 70. plus the other angle equaling 20 it'd be 90 degrees which is what the angle is. mark brainliest pls

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