Across
- 6. the conceptual operation of turning a system around an axis
- 8. the space between two intersecting lines or surfaces at or close to the point where they meet
- 9. the ratio of the hypotenuse (in a right-angled triangle) to the side opposite an acute angle; the reciprocal of sine
- 10. the trigonometric function that is equal to the ratio of the side opposite a given angle (in a right triangle) to the hypotenuse
- 12. a high school math student
- 13. a straight line from the center to the circumference of a circle or sphere
- 15. an angle of 90°, as in a corner of a square or at the intersection of two perpendicular straight lines
- 16. the ratio of the hypotenuse to the shorter side adjacent to an acute angle (in a right-angled triangle); the reciprocal of a cosine
- 17. a unit of measurement of angles, one three-hundred-and-sixtieth of the circumference of a circle
- 18. the trigonometric function that is equal to the ratio of the side adjacent to an acute angle (in a right-angled triangle) to the hypotenuse
Down
- 1. a unit of angle, equal to an angle at the center of a circle whose arc is equal in length to the radius
- 2. lines that intesect at a right angle
- 3. the branch of mathematics dealing with the relations of the sides and angles of triangles and with the relevant functions of any angles
- 4. are angles in standard position that have a common terminal side
- 5. the trigonometric function that is equal to the ratio of the sides (other than the hypotenuse) opposite and adjacent to an angle in a right triangle
- 7. a meeting point of two lines that form an angle
- 11. a circle whose radius is equal to 1
- 14. a straight line passing from side to side through the center of a body or figure, especially a circle or sphere