![]() Rotation 270° about the origin: Each x value becomes opposite of what it was. Rotation 180° about the origin: Each x and y value becomes opposite of what it was. Rotation 90° about the origin: Each y-value becomes opposite of what it was. Reflection across the line y=x: The x and y values switch places. Reflection across the y-axis: Each y-value stays the same and each y-value becomes opposite of what it was. Before learning the formula for 180-degree rotation, let us recall what is 180 degrees rotation. Reflection across the x-axis: Each x-value stays the same and each y-value becomes opposite of what it was. Transformation Rules on the Coordinate Plane Translation: Each point moves a units in the x-direction and b units in the y-direction. I can describe the effects of dilations, translations, rotations, and reflections on 2-D figures using coordinates.I can identify scale factor of the dilation.For rotations of 90, 180, and 270 in either direction around the origin (0. In general terms, rotating a point with coordinates (, ) by 90 degrees about the origin will result in a point with coordinates (, ). A rotat ion does this by rotat ing an image a certain amount of degrees either clockwise or counterclockwise. ![]() I can define dilations as a reduction or enlargement of a figure. A rotation is a type of rigid transformation, which means it changes the position or orientation of an image without changing its size or shape.Examples, solutions, worksheets, videos, and lessons to help Grade 8 students learn how to describe the effect of dilations, translations, rotations, and reflections on two-dimensional figures using coordinates. Determining rotations Google Classroom Learn how to determine which rotation brings one given shape to another given shape.
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