## math

##### Across
1. 2. greek word for three angle
2. 3. is a line segment from the center of the circle to any point of the circle
3. 5. unit used for angle measurement
4. 7. branch of mathematics which deals with triangles
5. 10. line w/c intersects the circle at one point only
6. 11. line segment which intersects the circle at two points
7. 15. θ
8. 16. RCP
9. 24. arc greater than 180 degrees
10. 25. ray from which the rotation starts
11. 26. generated by a ray rotating about a point
12. 27. line segment that divides the circle into w congruent semicircles
13. 28. less than 90 degrees
14. 29. 3.14159
##### Down
1. 1. founder of trigonometry
2. 4. The positive acute angle formed between the terminal side of an angle and the x-axis.
3. 6. angle which is 90 degrees
4. 8. greek word measure
5. 9. set of points w/c equidistant to a fixed point, center
6. 12. measure of the central angle that subtends an arc equal to the length of the radius
7. 13. circle whose radius is one unit
8. 14. Usually known as the almagest
9. 17. made by rene descartes
10. 18. austrian mathematician and astronomer in the european revival of the technical understanding of ideas
11. 19. angles whose vertex is the center of the circle
12. 20. 360 degrees
13. 21. angle whose vertex is on the circles
14. 22. ray from which the rotation ends
15. 23. line that interacts the circle at two points
16. 26. any part of a circle