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Review — Difficulty 10/10

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Trigonometry · Honors · Law of sines and law of cosines

Review skills for this standard. Write answers where shown.

Together with a parent

1. Similar triangles: sides 16, 17, and 18. Scale factor? ___ 2. If ΔABC ~ ΔDEF and AB/DE = 15, find BC/EF = ___ 3. Right triangle: opposite=16, hypotenuse=18. sin θ = ___

Written review

1. Similar triangles: sides 18, 19, and 20. Scale factor? ___ 2. If ΔABC ~ ΔDEF and AB/DE = 17, find BC/EF = ___ 3. Right triangle: opposite=18, hypotenuse=20. sin θ = ___ 4. Find missing side using tan 45° = ___ 5. Dilation scale factor 3. Image length? ___ 6. Explain why the triangles are similar.

_See printable PDF for diagram._

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Skills checklist

  • [ ] Proves or identifies similarity
  • [ ] Solves proportions from similar figures
  • [ ] Applies trig ratios correctly
  • [ ] Explains Law of sines and law of cosines without prompts

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