Transformations in the Coordinate PlaneFebruary 18, 2014 until… (5 School days)

Transformations move

figures in the coordinate

plane.An isometry

is a translation where thepre-image and image

are congruent.

Translations

You may think of a translation as a “slide.”

You will discover what moves a figure up, down, left, or right.

Reflections

You may think of a reflection as a “flip.”

You will discover the rules for reflection over the x-axis, the y-axis, the line y = x, and other lines.

Rotations

You may think of a rotation as a “turn.”

We normally rotate about the origin, and we normally rotate counterclockwise, but not always.

Dilations

You may think of a dilation as a “shrink” or “grow.”

Dilations must have a scale factor.

Dilations are the only transformation that is NOT an isometry.

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