\alpha

\mbox{lado \\mbox{oposto a \alpha}

\mbox{lado adjacente a \alpha}

\mbox{hipotenusa}

A = (2, 2)
a = Line(A, xAxis)
B = Point(a)
b = OrthogonalLine(B, a)
C = Point(b)
polígono1, c, a_1, b_1 = Polygon(A, B, C)
α = Angle(B, A, C)