Determining the angle of rotation
Answer Text: -When an object and its image is given, then to determine the angle of rotation, we need first to get the center of rotation: -if ABC is a triangle whose image is A and the center of rotation is p then: a)Join A to P and P to A'b) Join B to P and P to B'c).Join C to p and P to C'd).Measure angle APA', BPB' and CPC'These angles will be equal and their value is the Angle of rotation