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katrin2010 [14]
3 years ago
10

Please help with this

Mathematics
1 answer:
Aleksandr-060686 [28]3 years ago
6 0

Answer:

A

Step-by-step explanation:

(3x -14) + 9x is 90 degrees, so if you add 90 it becomes 180 degrees

It is 90 degrees because you can see that there is a right angle there

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