Question

what is the measure of ab?

Explanation:

Step1: Use the property of isosceles triangle

In a triangle, if two angles are equal, then the sides opposite to them are equal. Here, angles at \(B\) and \(C\) are equal.

Step2: Determine the length of \(AB\)

Since angles at \(B\) and \(C\) are equal, \(AB = AC\). Given \(AC = 12\), so \(AB=12\).

Answer:

\(12\)