ProveIt! Two-Column Proofs Practice Tool

Proof: Triangle Sum Theorem 1

N = 42 $\^o$

L = 116 $\^o$

M = 22 $\^o$

1.

1.

M = 22 $\^o$

L +

M +

N = 180 $\^o$

N = 42 $\^o$

42 $\^o$ +

M + 116 $\^o$ = 180 $\^o$ ;

M + 158 $\^o$ = 180 $\^o$

L = 116 $\^o$

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