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Need help with #20 please don’t understand it

Need help with #20 please don’t understand it-example-1
User Nataki
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1 Answer

1 vote

Answer:

same side alternate interior angles sum up to 180°.


x + 72 + 3x = 180 \\ 4x + 72 = 180 \\ 4x = 108 \\ x = 27

User KZapagol
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