正弦定理
Author: 藍邦偉　老師

正弦定理

 \frac{ a }{ sinA}= \frac{ b }{sinB }= \frac{ c }{sinC }=2R   

A = (7.8443649373881925, 4.274919499105546)
B = (4.187799642218247, -0.07706618962432879)
C = (10, 0)
多邊形1, c, a, b = Polygon(A, B, C)
d = Circle(A, B, C)
n = 4 (slider from 0 to 4, step 1)
α = Angle(B, A, C)
β = Angle(C, B, A)
γ = Angle(A, C, B)
r_1 = Radius(d)
文字4: "\frac{b}{sinB}= \frac{" + b + " }{" + (sin(β)) + " }=" + (b / sin(β))
文字2: "\frac{ a }{ sinA}= \frac{ " + a + " }{" + (sin(α)) + " }=" + (2.0 * r_1)
文字5: "  \frac{ c }{sinC }= \frac{ " + c + " }{" + (sin(γ)) + " }=" + (2.0 * r_1)
e = LineBisector(B, C)
f = LineBisector(A, C)
D = Intersect(f, e)
文字1: "c= \overline{ AB }=" + a + ",a= \overline{ BC }=" + b + ",b= \overline{ CA }=" + c
r = Segment(D, A)
g = Segment(B, D)
h = Segment(D, C)