A parabolae plural parabolas or parabola is a two-dimensional, mirror-symmetrical curve. It can be in any orientation in its plane and approximately U-shaped.
1. Area = 2 * h * b;
2. Arc Length = sqrt(b2 + 16 * h2)/2 + b2 * ln((4 * h + sqrt(b2 + 16 * h2))/b)/(8*h)