You probably haven't learnt this but the general equations for circle with centre at the origin is x^2+y^2=R^2 where R is the radius of the circle so R^2=(1737+185)^2.I am lazy to press my calculator so type it in yourself.
It is more than 0, because you cancel the x, and you get 2+5, which is 7
4:3 for the ratio and for the word ratio you can say that there is 4 squares and 3 triangles
2x - y = 0
2x = y
3x - 2(2x) = -3
3x - 4x = -3
-x = -3
x = 3
2(3) = y
6 = y
