math terms

2. a polygon's side or a solid figure's face by which the figure is measured or named
5. to find a number that is close to an exact amount
9. the number of square units needed to cover a surface
10. the middle number in a set of data
11. the distance around a circle
15. one of two sides on a right triangle that form the right angle
16. the set of whole numbers and their opposites
17. a closed plane figure formed by 3 or more line segments
20. the horizontal number line on a coordinate plane

1. a diagram that shows the prime factors of a number
3. the distance around a closed plane figure
4. a letter or symbol that stands for 1 or more numbers
6. the average of a set of numbers, found by dividing the sum of the set by the number of addends
7. capable of being divided with no remainder
8. a parallelogram with congruent sides
12. a tool used to form a circle or arc
13. a line segments with endpoints on a circle
14. the product of a given whole number
18. the point where two axes of a coordinate plane intersect (0,0)
19. the vertical number line on a coordinate plane