![]() Reflection An isometry that is a flip over a line where every point is the same distance from the central, or mirror, line. Reflectional symmetry – figure contains a line of symmetry.Symmetry –an exact correspondence in position or form about a given point, line, or plane.Mirror line – central line that the preimage is reflected over.Repeat for each point until the new pentagon is constructed.ĭrag each point and note how the shapes react.Select transform and then rotate in the menu.With the pointer, double-click point P.Create a pentagon and label the points A through E.If Patrick must make a 76°rotation to reach SpongeBob, where will the starfish end up? Draw the image. The rock is the center of rotation, (0,0). Patrick the starfish is trying to rotate around his house – a rock – to get to SpongeBob. A kid is watching his favorite show, SpongeBob SquarePants.At a 72° rotation, this starfish would map onto itself. Real-Life Application The bodies of starfish demonstrate rotations. Center of rotation: (0, 0) Angle of rotation: 180 ° clockwise * approximation ![]() ![]() Rotation An isometry that involves circular motion of a configuration about a given point or line, without a change in shape. Angle of rotation – measure of degrees that figure is rotated about a fixed point.Center of rotation – point on which a figure rotates.Rotational symmetry – shape can be rotated and it still looks the same.Matrices singular – matrixA way of organizing the coordinates of a figure. Isometry – transformation that preserves lengths.Transformation – operation that maps the preimage onto the image.Under the Sea A simple guide to transformations
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