# mathematics

##### Across
1. 4. a branch of mathematics dealing with symbols and the rules for manipulating those symbols
2. 6. the amount of space taken up by a 2D shape
3. 7. theoretically proven fact which gives reliably exact answers in experiments
4. 9. a symbol written above and to the right of a mathematical expression to indicate the operation of raising to a power
5. 11. a statement to be true using definitions, theorems, and postulates
6. 12. an assignment of values to the unknown variables that makes the equality in the equation true
7. 13. an unprovable rule
8. 15. an expression of more than two algebraic terms
9. 16. the distance around the edge of a shape.
10. 17. x coordinate
11. 20. a straight line extending from the center of a circle or sphere to the circumference or surface
##### Down
1. 1. the branch of mathematics concerned with the shape of individual objects, spatial relationships among various objects, and the properties of surrounding space.
2. 2. The "middle" of a sorted list of numbers.
3. 3. a symbol (usually a letter) standing in for an unknown numerical value in an equation.
4. 5. a line that intersects a system of lines.
5. 8. a statement in math in which two things on equal.
6. 10. y coordinate
7. 14. a fact or a rule written with mathematical symbols
8. 16. a number that reflects the chance or likelihood that a particular event will occur
9. 18. the quality or state of agreeing, coinciding, or being congruent
10. 19. a collection of quantitative data