Trigonometry Vocabulary

4. The sum of angles in a triangle
5. The branch of mathematics dealing with the relations of the sides and angles of triangles
9. Two angles whose sum is 90 degrees
10. 45-45-90 triangles and 30-60-90 triangles are both _____
11. A ratio of the lengths of two sides in a right triangle
16. The angle formed by the horizontal and the object below it
19. The angle formed by the horizontal and the object above it
20. The ratio of the side opposite of a right triangle divided by the adjacent side for a right triangle

1. 3-4-5, 5-12-13, 8-15-17
2. Two sides and base angles of this triangle are congruent
3. The side opposite the right angle in a right triangle
6. The side that does not touch the needed angle
7. Two angles whose sum is 180 degrees
8. In a right triangle the square of the length of the hypotenuse is equal to the sum of the squares of the lengths of the legs (a^2+ b^2 = c^2)
12. The area between two interior sides of a triangle
13. Side of a triangle
14. The ratio of the side opposite of a right triangle divided by the hypotenuse for a right triangle
15. The side that is next to the needed angle
17. A mnemonic device that is used to remember the 3 basic trigonometric ratios
18. The ratio of the adjacent side of a right triangle divided by the hypotenuse