trigonometry revision

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Across
  1. 4. a shape with three sides
  2. 5. what 'tan' is an abbreviation of
  3. 7. theorem theorem used in triangles
  4. 8. a right angle has how many degrees
  5. 10. what 'sin' is an abbreviation of
  6. 11. name of side opposite the right angle
Down
  1. 1. the unit in which we normally measure angles
  2. 2. greek symbol for angles
  3. 3. what are sin,cos,tan
  4. 6. side next to an angle
  5. 9. what 'cosine' is an abbreviation of
  6. 12. the number of seconds in a minute