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(3), , In the picture, two circles touch at a point, and the common tangent at this point is, drawn., , Prove that this tangent bisects another, common tangent of these circles., PO PC,, PB PC - PApB, , Prove that the points of contact of, these two tangents form the vertices, , ofaright triangle., LPA C LP CA X, , u, , PBC, , LPcB y, , +9+a+9-1s0, 2+2y [to, , Draw the picture on the right in your, , notebook, using convenientlengths., What is special about the quadrilateral, , fomed byjoiningthepoits ofcontact, ofthe circles?, , 4), , Rretorg -, , In the picture below, AB is a diameter and P. is a point on AB, , extended. A tangent fromPtouches the circleatQ. What is the radius, ofthe circle?, , tn D OP,, , *TA* **rh*****, , Cm, , 16C-1Y, 16Y C¢-16 48, , ***, , 3-3, , P