Crossword Puzzle - Vocabulary

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Across
  1. 2. A ___ is a closed figure/shape with three sides
  2. 4. A helpful mnemonic for remembering trigonometric functions-sine, cosine, and tangent
  3. 8. Equations that are always true for right angled triangles
  4. 10. A line that passes through the vertex of a triangle, meeting the other side and creating a right angle. A triangle has 3 of these
  5. 12. angle the smallest angle between the terminal(ending) side and the x-axis.(Hint: always less than or equal to 90 degrees)
  6. 14. The ___ of a polygon is half of its perimeter
  7. 15. triangle trigonometry In ___, the three trigonometric ratios are sine,cosine, and tangent, and are used to calculate unknown lengths and angles of a right triangle
Down
  1. 1. The four sections on a coordinate plane
  2. 3. of Cosines Rule for finding the third side of a triangle when we know two sides and the angle between them, and to find the angles of a triangle when we know all three sides; c^2 = a^2 + b^2 − 2ab cos(C)
  3. 4. In a right triangle, the ___ of an angle is the length of the opposite side divided by the length of the hypotenuse.
  4. 5. In a right triangle, the ___ of an angle is the length of the adjacent side divided by the length of the hypotenuse
  5. 6. ___ is the study of triangles and the relationship of its sides and angles
  6. 7. Identity The ___ comes from the Pythagorean theorem, with the first theorem stating that the right triangles formed by a unit circle will have a hypotenuse of 1.
  7. 9. In a right triangle, the ___ of one angle is the length of the opposite side divided by the length of the adjacent side.
  8. 11. Value The ___ of tan, sine,or cosine can be a fraction to give a more accurate answer, rather than an approximation.
  9. 13. A measure for angles, with 360 ___ being the full rotation