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Geometry 21 Online
OpenStudy (sbuck98):

I need help on #26:( I will award a medal!

OpenStudy (sbuck98):

OpenStudy (welshfella):

I'm not familiar with these 2 column proofs but basically because a || b the internal angles <1 and <4 , and <2 and <3 both add up to 180 degrees. So since we are given that <1 = <4 then <2 must be equal to <3.

zepdrix (zepdrix):

|dw:1443390689054:dw|

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