Constructing Tangents of a Circle

Use the navigation bar in the construction below to find out  how to construct tangents through a point in respect to a circle.

Try to redo this construction using the second applet on this page. If you need hints, use the dynamic figure above to show the construction process step by step.

2:1

Medial

A = (-3, 2)
B = (3, 1)
C = (1, 3)
polígono1, c, a, b = Polygon(A, B, C)
r = false
A' = Midpoint(a)
B' = Midpoint(b)
d = Line(A, A')
e = Line(B', B)
G = Intersect(d, e)
M = Midpoint(A, G)
N = Midpoint(B, G)
polígono2, e_1, g, h, d_1 = Polygon(B', M, N, A')
m = false
C' = Midpoint(c)
polígono3, f, e_2, d_2 = Polygon(B', A', C')