Pythagoras

A = (0, -1)
B = (12, -1)
C = (0, 4)
k1, c, a, b = Polygon(A, B, C)
α = Angle(B, A, C)
kuvio1, f, g, h, i, D, E = Polygon(B, A, 4)
kuvio2, j, k, l, m, F, G = Polygon(A, C, 4)
kuvio3, n, p, q, r, H, I = Polygon(C, B, 4)