**4.**lines running across from left to right**8.**the number of square unites needed to cover a surface**12.**any angle whose measure is greater than 90 and less than 180**16.**change in grouping**18.**two angles whose measures have a sum of 180**20.**lines running straight up and down**21.**in the right triangle, one of the two sides that form the right angle**22.**an equation showing that two ratios are equal**23.**the distance of a number form zero on the number line**24.**the longest side of a right triangle**25.**the product of an integer multiplied by itself

**1.**one of two identical factors of a given number**2.**a number sentence that shows equality of two mathematical expressions**3.**in any right triangle, the sum of the squares of the lengths of the legs**5.**a relationship between input and output in which the output depends on the input**6.**two angles whose measures have a sum of 90**7.**in a plane that do not intersect**9.**two events in which the outcome of the first event does not affect the outcome of the second event**10.**change in order**11.**the chance of an event occurring**13.**a symbol used to represent an unknown number or numbers**14.**the number of cubic units it takes to fill a figure**15.**two or more events such that the outcome of one influences the outcome of the others**17.**the ratio of the circumference of a circle to its diameter, approx. equal to 3.14**19.**any angle that measures less than 90**26.**the cost of a single unit of an item