Do you mean the angle measures?
If so, I assume you know that the sum of the three angles of a triangle is always equal to 180.
So, (3x - 30) + (2x) + (x + 30) = 180
We solve for x
3x + 2x + x = 180 (I combined like terms)
6x = 180 (I combined like terms of x)
x = 30 (I divided by 6 to isolate x)
Now, we replace every value of x for 30
3x - 30 = 3 (30) - 30 = 60
One angle is 60 (This is the angle at the top)
2x = 2(30) = 60
Another angle is 60 (Angle at the right)
x + 30 = 30 + 30 = 60
The other angle is 60 (Angle at the left)
This triangle is a equilateral triangle.
I hope this helps.
YOU'RE WELCOME :D
*brainliest*
