Talk:Power of a point/to do


 * Create image illustrating the various cases of the power of a point: point inside, point outside, point on the circumference.


 * Create image for the derivation of the secant-tangent theorem.


 * Write new section deriving the secant-tangent theorem.


 * Look up other synonyms of the secant-tangent theorem.


 * Research the history of this concept and of the secant-tangent theorem; place the idea in a larger context, both mathematical and historical.