Question 1200907
<br>
let x be the measure of each base angle
then the measure of the vertex angle is 3x-10<br>
The sum of the angle measures is 180:<br>
(x)+(x)+(3x-10)=180
5x-10=180
5x=190
x=38<br>
ANSWER: The measure of the vertex angle is 3x-10 = 3(38)-10 = 104 degrees<br>