Rotation

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Synopsis: This diagram shows three triangles; the original triangle and its rotation in two different directions to two new positions. A locator dot and title are shown. These must always be at the top left of the page when the image is the right way up. There is a graph with all four quadrants showing, and the x and y axes ranging from -3 to 3. The x and the y axes intersect at the origin marked by an X. Axes values are positive to the right and to the top of the diagram. Axes values are negative to the left and to the bottom of the diagram. Not all axis division marks are labelled. Some of the braille uses maths code notation. When an object is rotated it stays the same shape but its position and orientation change. The original triangle is in the top left quadrant. The triangle rotated 90? clockwise is to the right. The triangle rotated 180? anticlockwise is shown in the bottom right quadrant. Their path of movement is indicated by curved heavy dashed arc lines. Note the 90? arc in the top right quadrant is broken in the tactile version of the graph to allow a braille label to be clearly read.

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