Proof: Straight Angle 1     
line WXY
WXZ = 135
ZXY = 45
1. 
1. 
45 = ZXY
180 = 135 + ZXY
WXY = 180
WXY = WXZ + ZXY
WXZ = 135
line WXY



ProveIt! by Michael Ferraro <mferraro@balstaff.org>.
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