##### Across

**4.**a branch of mathematics dealing with symbols and the rules for manipulating those symbols**6.**the amount of space taken up by a 2D shape**7.**theoretically proven fact which gives reliably exact answers in experiments**9.**a symbol written above and to the right of a mathematical expression to indicate the operation of raising to a power**11.**a statement to be true using definitions, theorems, and postulates**12.**an assignment of values to the unknown variables that makes the equality in the equation true**13.**an unprovable rule**15.**an expression of more than two algebraic terms**16.**the distance around the edge of a shape.**17.**x coordinate**20.**a straight line extending from the center of a circle or sphere to the circumference or surface

##### Down

**1.**the branch of mathematics concerned with the shape of individual objects, spatial relationships among various objects, and the properties of surrounding space.**2.**The "middle" of a sorted list of numbers.**3.**a symbol (usually a letter) standing in for an unknown numerical value in an equation.**5.**a line that intersects a system of lines.**8.**a statement in math in which two things on equal.**10.**y coordinate**14.**a fact or a rule written with mathematical symbols**16.**a number that reflects the chance or likelihood that a particular event will occur**18.**the quality or state of agreeing, coinciding, or being congruent**19.**a collection of quantitative data