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Vertical Angles Theorem: Algebra Proof

Author:Olivia Urban, Steve Phelps, Wendy Sanchez

Preliminary version

How do we know that angle a + b = 180 degrees and angles b + c = 180 degrees?

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Check my answer (3)

How do we know that angles a + b = b + c ?

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  • D
Check my answer (3)

How do we know that angles a = c ?

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  • D
Check my answer (3)

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