The Book of Lemmas: Proposition 5
Main Concept
Let AB be the diameter of a semicircle, C any point on AB, and CD perpendicular to it, and let semicircles be described within the first semicircle and having AC, CB as diameters. Then if two circles be drawn touching CD on different sides and each touching two of the semicircles, the circles so drawn will be equal.
Adjust the slider, or click and drag on the plot to change the value of r
Properties
radius =
More MathApps
MathApps/AlgebraAndGeometry
Download Help Document
