Question

if ac = 19 and bc = 12, find ab.
ab =

Explanation:

Step1: Use segment addition postulate

From the diagram, we know that \(AC = AB + BC\).

Step2: Solve for \(AB\)

Rearrange the formula to \(AB=AC - BC\). Substitute \(AC = 19\) and \(BC = 12\) into the formula: \(AB=19 - 12\).

Answer:

\(7\)