Across
- 3. a line segment extending from the center of a circle or sphere to the circumference or bounding surface.
- 7. the set of all points in the plane that are a fixed distance (the radius) from a fixed point (the centre)
- 8. is a triangle in which one angle is a right angle or two sides are perpendicular.
- 10. 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
- 11. a circle whose radius has a length of one unit
Down
- 1. The axes of a two-dimensional Cartesian system divide the plane into four infinite regions, called quadrants, each bounded by two half-axes
- 2. the angle between the terminal side of the angle and the x-axis
- 4. the trigonometric function that for an acute angle is the ratio between the leg opposite the angle when it is considered part of a right triangle and the hypotenuse.
- 5. is a measurement of a plane angle in which one full rotation is 360 degrees.
- 6. a geometric line, curve, plane, or curved surface that touches another curve or surface at one point but does not intersect it
- 8. the SI unit for measuring angles, and is the standard unit of angular measure used in many areas of mathematics
- 9. 3.14159265359