A = (3, 8)
B = (7, 8)
C = (7, 11)
D = (3, 11)
f = Segment(A, B)
g = Segment(C, B)
h = Segment(C, D)
i = Segment(D, A)
c = Circle(C, D)
d = Circle(A, D)
j = Line(C, B)
E = Intersect(c, j, 2)
F = Intersect(c, d, 2)
G = Intersect(d, f, 1)
H = Intersect(c, f)
e = CircleArc(C, D, E)
k = CircleArc(A, G, D)
t1, e_1, g_1, b = Polygon(G, B, E)

Tool: 内切圆
内切圆[ <点>, <点>, <点> ]
Input: A, B, C
Output: d

t1, c, a, b = Polygon(A, B, C)
f = AngularBisector(B, A, C)
g = AngularBisector(A, C, B)
E = Intersect(g, f)
h = OrthogonalLine(E, a)
G = Intersect(h, a)
d = Circle(E, G)