Trigonometry

2. stems from the Greek word trigonon, which means "triangle"
3. angles, are angles of equal measure that are opposite one another and share the same vertex
6. an angle measuring greater than 90 degrees but less than 180 degrees
9. if the sum of the measures of two positive angles is 90 degrees
10. an angle measuring greater than 0 degrees but less than 90 degrees
12. the portion of the line that starts at one point and extends to infinity
17. the longest side of a right triangle
20. way of breaking down degrees
22. an angle that has its vertex at the center of a circle
23. digits, is found by counting all of the digits from left to right starting with the first nonzero digit
24. an angle formed by one complete counterclockwise rotation
25. is formed when a ray is rotated around its endpoint

1. a triangle with three equal sides
4. an angle measuring exactly 90 degrees
5. two angles in standard position with the same terminal side
7. position, if its initial side is along the positive x-axis and its vertex is at the origin
8. the two other sides of the right triangle
11. is a straight path connecting two points
13. if the sum of the measures of two positive angles is 180 degrees
14. an angle measuring exactly 180 degrees
15. a triangle with two equal sides
16. measure, one way to measure the size of an angle
18. segment, the portion of the line between two points
19. angles, angles in standard position with terminal sides along the x-axis or y-axis
21. a triangle with no equal sides