A = (5.12, -2.58)
B = (0.28, 1.06)
C = (10.1, 1.28)
f = Segment(B, C)
g = Segment(C, A)
h = Segment(A, B)
t1, a, b, c = Polygon(B, C, A)
α = Angle(B, C, A)
β = Angle(A, B, C)
γ = Angle(C, A, B)
टेक्स्ट1: "ANGLE sum property of a triangle
∠A+∠B+∠C = " + α + "+" + β + "+" + γ + "= 180°"