∡A=

∡B=

∡C=

∡D=

∡A+∡B+∡C+∡D=

A = (-1.592793269230771, 4.9015192307692335)
B = (5.747369230769231, 5.564343269230772)
C = (9.086038461538461, -2.5122903846153832)
D = (-3.090284615384615, -2.4631923076923066)
đa giác1, a, b, c, d = Polygon(A, B, C, D)
gocA = Angle(D, A, B)
gocB = Angle(A, B, C)
gocC = Angle(B, C, D)
gocD = Angle(C, D, A)
text5: gocA + ""
text6: gocB + ""
text7: gocC + ""
text8: gocD + ""
E = (10.976314423076921, 0.973673076923076)
F = (18.19373173076923, 1.1455163461538453)
e = Segment(E, F)
t: gocA + gocB + gocC + gocD
text10: t + ""