ProveIt! Two-Column Proofs Practice Tool

Proof: Triangle Exterior Angle Theorem 1

T = 40 $\^o$

SUV = 145 $\^o$

S = 105 $\^o$

1.

1.

105 $\^o$ =

S

T = 40 $\^o$

SUV = 145 $\^o$

145 $\^o$ =

S + 40 $\^o$

SUV =

S +

T

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