CROSSWORD PUZZLE

4. . is the length of the opposite side divided by the length of the hypotenuse
6. . is the length of the adjacent side divided by the length of the opposite side
10. . is only a part of the area of an entire circle
12. is a unit of measure for angles used mainly in trigonometry. It is used instead of degrees.
13. fined as the ratio of a circle's circumference to its diameter
14. the longest side of a right-angled triangle, the side opposite the right angle\
16. Opposite / Adjacent
17. is a branch of mathematics that studies relationships between side lengths and angles of triangles.
18. always uses the x-axis as its frame of reference
20. . is an angle of exactly 90°, corresponding to a quarter turn
22. . is opposite to the angle
23. . is a line that intersects a circle at two points

1. The axes of a two-dimensional Cartesian system divide the plane into four infinite regions
2. the trigonometric function that is equal to the ratio of the side adjacent to an acute angle (in a right-angled triangle) to
3. . a unit of measure for angles
5. angles who share the same initial side and terminal sides
7. is a polygon with three edges and three vertices
8. from Greek metron 'measure'
9. . is where the angle starts
11. side is the side next to the angle in question
15. are a way of measuring an angle from a different direction
19. formed by two rays lie in a plane
21. Hypotenuse/Opposite
24. from Greek trigōnon, 'triangle'