Similar Figures.

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Similar and Congruent Figures. Similar figures have the same shape, but not the same size. They must have the same ratio of side lengths Congruent figures.
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Presentation transcript:

Similar Figures

Batman says: “You got this.”

Comparing shapes One way of comparing shapes is to determine if they are - Congruent or - Similar

Congruent shapes Same angles Exact same side lengths Can be rotated, or reflected (flipped) A cut-out of one shape will always fit exactly over the other

Congruent shapes

Similar Figures Same angles Same shape Can be rotated, or reflected MAJOR DIFFERENCE: The side lengths are larger or smaller Side lengths must be in proportion with the original

If you are given the dimensions of one shape, and are asked to find the dimensions of a similar figure Set up equivalent fractions (cross multiplication) new side length new side length old side length old side length

Copy down the steps from the board Por ejemplo Copy down the steps from the board