Question

given: ab = bc prove: b is the midpoint of $overline{ac}$. what is the format of this proof? two - column proof one - paragraph proof flowchart proof two - paragraph proof ab = bc given $overline{ab}congoverline{bc}$ def. of $cong$ segs. b is the midpoint of $overline{ac}$ def of midpt

Explanation:

The proof has two - columns. One column lists statements (AB = BC, $\overline{AB}\cong\overline{BC}$, B is the mid - point of $\overline{AC}$) and the other lists the reasons (given, def. of $\cong$ segs., def. of midpt). This is characteristic of a two - column proof.

Answer:

A. two - column proof