Well I can't see the picture clearly but what I can.n see is that you need f×2,360 and you also need to find what f is then go on from their
- 3 1/2 : 1 3/4 =
= -7/2 : 7/4
= -7/2 x 4/7
= -4/2
= -2
The answer should be 40 degrees. A triangle has 180 degrees total, so if you add the angles together then subtract from 180 it would be 40