Chapter 8 Vocabulary

4. You can use ___________ Trigonometric Ratios (Like sin^-1) to find angle measures.
5. Can be used to solve a triangle if you know the measures of two sides and the included angle.
7. A mnemonic device for learning sine, cosine, and tangent.
9. A set of three nonzero whole numbers that satisfy the Pythagorean Theorem.
10. The study of angles.
14. A segment from the vertex of a triangle and perpendicular to the opposite side.
16. The length of a vector.
18. The angle formed by a horizontal line and a line of sight above the horizontal line.
19. This is the abbreviation for Cosine
23. The square root of the product of two numbers.
25. The angle formed by a horizontal line and a line of sight below the horizontal line.
27. This is the reciprocal of the Cosine Function.
28. The form of a vector that describes it in terms of its x and y components.
29. The ratio of the opposite side to the hypotenuse of a right triangle.
30. This is the abbreviation for Sine
31. The ratio of the adjacent side to the hypotenuse of a right triangle.
33. A quantity that has both a magnitude and direction.
34. This is the reciprocal of the Sine function.

1. 45-45-90 and 30-60-90 triangles are called _______ Right Triangles.
2. Vector Addition, Vector Subtraction, and Scalar Multiplication are types of _________ __________.
3. The side across from the 90 degree angle in a right triangle.
6. This is the reciprocal of the Tangent Function.
8. This theorem states a squared plus b squared equals c squared.
11. A mathematician from Cyrene who used the angle of elevation of the sun to measure the circumference of the Earth.
12. A ratio of the lengths of two sides of a right triangle.
13. The angle formed by a vector with a vertical or horizontal line.
15. This is the abbreviation for Tangent
17. To _______ a triangle means to find the measure of all sides and all angles.
20. A point in three-dimensional space.
21. A vector whose initial point is the origin is said to be in this.
22. The sum of two or more vectors.
24. The two sides that form the 90 degree angle in a right triangle.
26. The ratio of the opposite side to the adjacent side of a right triangle.
32. Can be used to find side lengths and angle measures for any triangle.