mid term puzzle

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

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