Author: Created by Mr Lafferty@mathsrevision.com
Date: 24 March 2013

A = (4.517272100090812, 5.918974542073371)
B = (7.473901554176077, 2.845770245047329)
C = (0.3730364335464585, 2.9579735313778244)
Triangle, c, a, b = Polygon(A, B, C)
α = Angle(B, C, A)
β = Angle(C, A, B)
γ = Angle(A, B, C)
δ: α + β + γ
Sum: "Sum of angles = " + (LaTeX[α]) + " + " + (LaTeX[β]) + " + " + (LaTeX[γ]) + " = " + (LaTeX[δ]) + ""