Proof: Triangle Sum Theorem 1     

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N = 42 L = 116 M = 22
1.	1.
42 + M + 116 = 180; M + 158 = 180
L = 116
N = 42
L + M + N = 180
M = 22

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