ProveIt! Two-Column Proofs Practice Tool

Proof: Quadrilateral Sum Theorem 1

1 = 80 $\^o$

3 = 95 $\^o$

5 = 100 $\^o$

4 =85 $\^o$

1.

1.

2 = 80 $\^o$

1 = 80 $\^o$

2 +

3 +

4 +

5 = 360 $\^o$

80 $\^o$ + 95 $\^o$ +

4 + 100 $\^o$ = 360 $\^o$ ; 275 $\^o$ +

4 = 360 $\^o$

4 = 85 $\^o$

3 = 95 $\^o$

5 = 100 $\^o$

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