Also, this formula works by assuming that doubling the base length of an isoceles triangle also doubles its non-isoceleusic angle, which I'm not sure if it works or not in practise, and maybe it only works if you cut an isoceles triangle in half, turning it into a right-angled triangle, and the angle mentioned would be cut in half, or if this only works this way and not by expanding the base length and if it exponentially decreases in doublingness as the angle increases, etc . If this is the case, please adjust my formula, but keep its simplicity.
