Pythagorean Theorem

4. The longest side of the triangle
6. Includes the x-axis and the y-axis on the same plane
8. The horizontal number line in the coordinate plane.
11. the branch of mathematics concerned with the properties and relations of points, lines, surfaces, solids, and higher dimensional analogs.
13. Greek philosopher and mathematician who proved the Pythagorean theorem
17. The sides of a right triangle that form a 90 degree angle.
18. A statement that can be proved to be true based on known and proved facts
19. The square root symbol.
20. A real number that cannot be expressed as a decimal that terminates or repeats.
21. a^2+b^2=c^2

1. The y-coordinate
2. The first number in an ordered pair.
3. The division of the coordinate plane.
5. The vertical number line in the coordinate plane.
7. The inverse of squaring a number.
9. The two coordinates that create a point.
10. The point where the zero points of the two number lines meet at right angles in the coordinate plane.
12. A system that uses one or more numbers, or coordinates, to uniquely determine the position of the points or other geometric elements on a manifold such as Euclidean space.
14. The second number in an ordered pair.
15. A triangle that contains a 90 degree angle.
16. Contains the set of rational numbers and the set of irrational numbers.