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suter [353]
3 years ago
14

This is geometrey and this < is the angle symbol. Please help!

Mathematics
1 answer:
jonny [76]3 years ago
6 0

Given: ∠3 = ∠4

1) ∠1 = ∠4 because of vertical angles

2) ∠4 = ∠3, given

3) So ∠1 = ∠4 = ∠3, so ∠1 = ∠3, because of transitive property

2) ∠3 + ∠2 = 180 degrees because definition of a straight line

3) ∠1 + ∠2 = 180 degrees, using substitution

4) Since ∠1 + ∠2 adds up to 180 degrees, that makes them supplementary angles.

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