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8.2 Similar Polygons

8.2 Similar Polygons. Vocabulary. Similar- two figures with the same shape but not necessarily the same size. Two figures are similar if: Corresponding angles are congruent Corresponding sides are proportional Similarity ratio: ratio of the lengths of the corresponding sides.

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8.2 Similar Polygons

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  1. 8.2 Similar Polygons

  2. Vocabulary • Similar- two figures with the same shape but not necessarily the same size. • Two figures are similar if: • Corresponding angles are congruent • Corresponding sides are proportional • Similarity ratio: ratio of the lengths of the corresponding sides

  3. Ex 1: ABCD EFGH

  4. Ex 1: ABCD EFGH

  5. Ex 2: • The corresponding angles are congruent

  6. Ex 2: • The corresponding angles are congruent

  7. Ex 3: LMNO QRST • Find QT and ST

  8. Ex 3: LMNO QRST • Find QT and ST • QT = 2.4 ST = 3.8

  9. The Golden Ratio

  10. The Golden Ratio

  11. The Golden Ratio: 1.618

  12. Golden Ratio • http://www.youtube.com/watch?v=vD3Uzj3HyU4&feature=player_embedded

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