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Shape Comparison: Congruent vs. Similar Figures Explained

Learn the difference between Congruent and Similar shapes with Batman! Discover how to identify, compare, and work with these shapes when asked to find new dimensions for a similar figure.

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Shape Comparison: Congruent vs. Similar Figures Explained

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  1. Similar Figures

  2. Batman says: “You got this.”

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

  4. 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

  5. Congruent shapes

  6. 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

  7. 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

  8. Por ejemplo • Copy down the steps from the board

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