Proof: Quadrilateral Sum Theorem 1     
1 = 80
3 = 95
5 = 100
4 =85
1. 
1. 
4 = 85
1 = 80
2 + 3 + 4 + 5 = 360
3 = 95
5 = 100
2 = 80
80 + 95 + 4 + 100 = 360; 275 + 4 = 360



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