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



ProveIt! by Michael Ferraro <mferraro@balstaff.org>.
Copyright ©2010. All rights reserved.