text: homework help needed majory!? at point p, 4 centimeters from the center of the circle, two tangent lines to the circle form a right angle. find the measure of the diameter of the circle. justify your answer...this is the question i have and they gave no picture with it...and i have no idea how to do it..even if ur not sure exactly how but you have some idea on how to solve it...itll be appreciated..thanks =] isn't the diameter 8? because if p is the point of tangecy, it means it's on the edge, and four cm away from the center (which would make 4 the radius)..so eight is the diam.