Outside Inside and On Circumference Angles

Outside Inside and On Circumference Angles

Created by Mr.Lafferty@mathsrevision.com

Centre

Triangle with Hypotenuse equal to  Diameter 
Outside Inside and ON the Circumference.

∡ DBF

∡ BFD

∡ FDB

Size = 3.5 (slider from 1 to 5, step 0.5)
C = (1, 3)
A = Intersect(xAxis, yAxis)
c = Circle(A, Size)
B = Point(c)
a = Line(A, B)
D = Intersect(c, a, 2)
E = Point(c)
F = (1, -5)
poly1, d, f, b = Polygon(F, B, D)
α = Angle(D, B, F)
β = Angle(B, F, D)
γ = Angle(F, D, B)
e = false
g = false
h = false