This smartboard lesson can be used to introduce students to tangent segments.
The lesson begins with a Do Now where students draw two sets of tangent and measure the tangent segments to discover that each pair of tangent segments are congruent.
The tangents are then extended to form a polygon and students use their new ideas to find the perimeter of the polygon.
A Do Now and a Demonstration of Learning are included. Direction for using the smartboard file are also included.