Trigonometry Revision Crossword

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Across
  1. 3. Finding the opposite side, and you already know the angle and the adjacent side. What trig identity should you use?
  2. 5. How many significant figures you should write your answers correct to.
  3. 6. You want to find an angle in a non-right angled triangle. You know the lengths of all the sides. Which rule should you use?
  4. 7. If you are getting wrong answers your calculator might not be in this mode.
  5. 9. Longest side in a right angled triangle.
  6. 11. You need to find the size of an unknown angle. Which rule should you use if you already know the lengths of 2 sides and the size of 1 angle.
  7. 14. This direction is on a bearing of 180 degrees.
  8. 16. The smallest angle in a triangle is opposite to the ____ side.
  9. 20. Rule to find the area of a triangle if you know the lengths of all 3 sides.
  10. 22. This side is next to the reference angle in a right angled triangle.
  11. 23. The number of cm in a m.
Down
  1. 1. Use this theorem to find sides in a right angled triangle.
  2. 2. This variable should be on the x-axis.
  3. 3. Number of sides in a triangle.
  4. 4. The ______ angle in a triangle is opposite the longest side.
  5. 8. If you know the length of all three sides in a non-right angled triangle you can use Cosine Rule to find the size of any ______ in the triangle.
  6. 10. This direction is on a bearing of 090 degrees.
  7. 11. Use this rule if there are 2 sides and 2 angles involved.
  8. 12. Bearings are measured clockwise from _______
  9. 13. The number of m in a km.
  10. 15. Use this trigonometric identity if you know the hypotenuse and angle, and want to find the adjacent side.
  11. 17. Area of a triangle = 1/2 x base x ______.
  12. 18. The angles in this shape add up to 180 degrees.
  13. 19. Use this on your calculator to help to solve equations.
  14. 21. The number of mm in a cm.