Rotation about a Point. Conic Sections: Parabola and Focus. example
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The basics steps are to graph the original point (the pre-image), then physically 'rotate' your graph paper, the new location of your point represents the coordinates of the image. It's much easier to understand these steps if you
Solution : Step 1 : Trace triangle XYZ and the x- and y-axes onto a piece of paper. Step 2 : Let X', Y' and Z' be the vertices of the rotated figure. Since the triangle is rotated 90° counterclockwise about the origin, the rule is. (x, y) ----> (-y, x) Step 3 :
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Create a polygon and point at the origin to be the center of rotation. Perform a composition of a reflection and rotation. Try reflecting over the y-axis, then rotating the first image 90˚ counter-clockwise about the origin. Then reverse the order, rotating first, then reflecting.