The vertex angle of an isosceles triangle measures more than the base angle. Find the measure of the vertex angle.
An isosceles triangle has 2 base angles that are equal in measure.
Write an equation to show that the sum of the triangle's angle measure is . Let represent the measure of each base angle and represent the measure of the vertex angle. Solve for .
So, the base angle has a measure of .
The vertex angle measures more than the base angle: