Outline on the board the method for determining the unknown line segment of a chord which intercepts a second chord forming a total of 4 line segments. Chord 1 consists of segments a,b and chord 2 consists of segments c,d The product of ab = the product of cd. An example and a few problems were given to increase learning. A second theorem involves a secant and a tangent, with a vertex outside the circle. The square of the tangent segment equals the sum of the secant segment times the outer segment of the secant. Examples and problems given to strengthen understanding...