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.

A = (-3, 2)
B = (3, 1)
C = (1, 3)
polígono1, c, a, b = Polygon(A, B, C)