Transformations
Author: Yvan Monka

O_1 = (-4, 10)
B_1 = (18, -12)
d = Line(O_1, B_1)
K = (-7, 9)
L = (-12, 12)
D = Point(d)
E = Point(d)
F = (-92.27291666666669, -78.02812500000002)
A = (6, 4)
B = (1, 6)
C = (5, 8)
P, c, a_1, b = Polygon(A, B, C)
T1: "Aire(ABC)=" + P
O = (7, 8)
G = (4, 13)
H = (7, 12)
u = Vector(G, H)