CROSSWORD PUZZLE

4. side is the side next to the angle in question
6. is a unit of measure for angles used mainly in trigonometry. It is used instead of degrees.
7. the longest side of a right-angled triangle, the side opposite the right angle\
9. . is where the angle starts
11. . is the length of the adjacent side divided by the length of the opposite side
12. . is the length of the opposite side divided by the length of the hypotenuse
13. angles who share the same initial side and terminal sides
18. are a way of measuring an angle from a different direction
20. from Greek trigōnon, 'triangle'
21. . is opposite to the angle
22. Opposite / Adjacent
23. . is only a part of the area of an entire circle

1. . is a line that intersects a circle at two points
2. . a unit of measure for angles
3. The axes of a two-dimensional Cartesian system divide the plane into four infinite regions
5. fined as the ratio of a circle's circumference to its diameter
6. always uses the x-axis as its frame of reference
8. is a polygon with three edges and three vertices
10. the trigonometric function that is equal to the ratio of the side adjacent to an acute angle (in a right-angled triangle) to
14. is a branch of mathematics that studies relationships between side lengths and angles of triangles.
15. . is an angle of exactly 90°, corresponding to a quarter turn
16. formed by two rays lie in a plane
17. from Greek metron 'measure'
19. Hypotenuse/Opposite