##### Across

**7.**/ The sum of the lengths of the sides of a polygon**10.**/ The middle number in a data set when the data are put in order**11.**/ A positive angle measuring less than 90 degrees**14.**/ The value of a variable that makes an equation true**15.**/**16.**/ measured in degrees**18.**/ The distance from the center to a point on a circle**20.**/ The steepness of a line expressed as a ratio, using any two points on the line**21.**/ The point on an angle where the two sides intersect

##### Down

**1.**/ Points that lie on the same line**2.**/ identical double**3.**root / the number which, if multiplied by itself gives you the original number**4.**/ The top part of a fraction**5.**/ In a data set, the sum of all the data points, divided by the number of data points; average**6.**/ The number which, when multiplied times a particular fraction, gives a result of 1**8.**/ A type of numbers used to count**9.**/ A point on a line segment that divides the segment into two congruent segments**12.**/ A type of number that can be expressed as the ratio of two integers**13.**/ A parallelogram with four equal sides**17.**/ A type of natural number that is divisible by 2**19.**/ The ten symbols, 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9