IntroductionWe shall look at transforming shapes around a grid using rotation. Below is a shape on a grid that we could use for this practice. To describe a rotation we need to identify the centre of rotation, how much it is turned for example angle such as 90 degrees, and whether the rotation is clockwise or anticlockwise
Describing rotationsHere we shall explore describing rotations. Below is a grid with shpe E rotated on to shape F. We can see that the angle of rotation is 90 degrees clockwise. The centre of rotation is at;
Direction of rotationWe describe an anticlock wise rotation as a positive rotation. The diagram below shows a positive rotation of 90° about 10. You can describe the rotation as a rotation of +90° about O. We call a clockwise rotation a negatve rotation. The diagram below shows a negative rotation of 90° about O. You could describe the rotation above +90 about O.
Learn more about this topic in the following pages.