Answer:
72 degrees.
Step-by-step explanation:
The triangle is isosceles, so angle ACB and angle ABC will be the same. There are 180 degrees in a triangle, so you can set up the following equation...
3x + 2(6x) = 180
3x + 12x = 180
15x = 180
x = 12
Since you have the value of x, you can find the angle measurement of angle ABC!
6 * 12 = 72 degrees.
Hope this helps!
