Square equals three triangles, triangle plus square equals 48, circle equals 252 divided by triangle
Because square = 3 * triangle
So triangle + square = triangle + 3 * triangle = 4 * triangle = 48
So triangle = 48 / 4 = 12
Square = 3 * triangle = 3 * 12 = 36
Circle = triangle / 252 = 12 / 252 = 1 / 21
In this topic, division is understood as dividing by,
Then: circle = 252 / triangle = 252 / 12 = 21
Otherwise, you won't get an integer answer