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Examine the paragraph proof. Which theorem does it offer proof for?

Examine the paragraph proof. Which theorem does it offer proof for?-example-1
User Joshua Ohana
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1 Answer

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23 votes

The proof states that:


\begin{gathered} \angle XVZ+\angle ZVY=180 \\ \angle WVY+\angle ZVY=180 \end{gathered}

Subtract the two equations to conclude that:


\begin{gathered} \angle XVZ-\angle WVY=0 \\ \angle XVZ=\angle WVY \end{gathered}

Similarly it can be proved that:


\angle XVW=\angle ZVY

This proof is for the vertical angle theorem.

Option C is correct.

User Matt Parkins
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