why are we assuming it is 120.
How do we go about solving it.
I didn’t understand the solution one bit
We are not assuming; we can show that it is 120 degrees by applying properties of triangles you’ve learned earlier in the course. In particular, that it is isosceles.
how
I did it as 2x+30=180 and I am getting 75
The equal angles are the 30s, not “x”.