Geometric Transformation Rules
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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Rule for Reflection over x-axis | x stays the same, y changes signs (x, -y)
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Rule for Reflection over y-axis | x changes signs, y stays the same (-x, y)
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Rule for 90 degree counter-clockwise rotation | Reverse, then change the sign of the first (-y, x)
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Rule for 90 degree clockwise rotation | Reverse, then change the sign of the 2nd (y, -x)
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Rule for 180 rotation | Change both signs (-x, -y)
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How do you find the scale factor (k)? | image/original
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What does (x - 3, y + 2) mean? | Move the figure 3 left and 2 up
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If k = 1.5 is the dilation a reduction or enlargement? | Enlargement
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What changes in a translation? (location, orientation, or size)? | Location (moves to a new spot)
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What changes in a reflection? (orientation, or size)? | Orientation (faces a different direction)
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What changes in a dilation? (orientation, or size)? | Size (gets bigger or smaller)
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How does a scale factor of 5 affect area? | Makes the area 25 times bigger (5 squared)
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You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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