mathematics

3. the distance from the center of the circle to a point on its circumference
4. three or more points lie on a straight line
7. a number that will divide into another number exactly
10. longest length between two points on the circumference of a circle
11. a proposition that is not actually proved or demonstrated, but is considered to be self-evident and universally accepted
12. a polynomial algebraic expression or equation with two terms

1. two lines intersecting each other at 90 degrees
2. numbers containing infinite number of non-repeating digits
5. line segment through a vertex and perpendicular to a line containing the base
6. a statement that can be demonstrated to be true by accepted mathematical operations and arguments
8. a branch of mathematics that uses symbols or letters to represent variables which are used to express operations and equations
9. an angle that is more than 180° but less than 360°