Which is a valid proportion? 3 21

428

5 29

630

16

O 7° 49

2 12

05-15

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m∠5 + m∠3 = m∠1   is true.

m∠5 + m∠6 = 180 is true

m∠2 +m∠3 = m∠6   is true

m∠2 +m∠3 +m∠5 = 180   is true