Mathematics vocabulary

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Across
  1. 4. have 3 angles=180°
  2. 5. minus
  3. 8. √
  4. 9. divide
  5. 11. x2
  6. 12. angle that is <90°
Down
  1. 1. times x
  2. 2. plus
  3. 3. x3
  4. 6. angle that =90°
  5. 7. angle that is >90°
  6. 10. sine2θcos2θ