Centre and angle of rotation

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Presentation transcript:

Centre and angle of rotation By Dominic Bradley

Imagine a rectangle C B D A

That rotates around a point C B D A

To give a new rectangle C B B D C A A D

Or rotates even further C B B D C A A D B A C D

Each point rotates on a circle around the origin of rotation B B D C A A D B A C The centre of rotation is the point around which an object moves. It is always the same distance from the moving point. D

The angle of rotation is between the origin and each point that moves

Join the 2 points “A” to the Centre of Rotation B B D C A A D B X A C D Measure the angle created to give the Angle of Rotation