transformations in the coordinate plane
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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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