Math Crossword Puzzle

7. An angle with a measure of 90 deg.
9. Base ten numbers written in the form a × 10^n where 1 ≤ a ≤ 10 and n is an integer.
11. The side opposite the right angle in a right triangle.
13. The two sides of a right triangle that form the right angle.
15. The point of intersection of a graph with the x-axis.
18. the number x is usually called the base of the expression x^n, and n is called the exponent.
20. A triangle that has a right angle.
21. K is called the constant of proportionality.

1. A circular movement opposite to the direction of the movement of a clock.
2. An equation showing the relationship between two or more quantities represented by variables.
3. A math sentence using the equal sign to state that two expressions represent the same number.
4. The point with coordinate 0 on a number line; the point with coordinates (0, 0) in the coordinate plane.
5. The point of intersection of a graph with the y-axis.
6. A letter or symbol that represents an unknown quantity.
8. The horizontal axis of a coordinate plane.
10. The equation y = mx + b is the slope-intercept form of a line, where m is the slope and b is the y-intercept of the line.
12. A ratio of two unlike quantities that has a denominator of 1 unit.
14. Two lines in a plane that never intersect.
16. Interest paid a single time on a principal invested or borrowed. Computed using I = Prt.
17. A pair of numbers that represent the coordinates of a point in the coordinate plane
19. The vertical axis of a coordinate plane.