# Flashcards › PSSA Math Vocabulary

## chord a line segment whose endpoints are on a circle circumference the distance around a circle composite number a whole number having more than two factors diameter a line segment that has endpoints on a circle and passes through the center of the circle expanded notation a way to write numbers that shows the value of each digit (4372=4000+300+70+2) Greatest Common Factor (GCF) the largest factor that 2 or more numbers have in common heptagon a polygon with seven sides histogram a bar graph in which the labels for the bars are numerical intervals hypotenuse the longest side of a right triangle (which is also the side opposite the right angle) Least Common Denominator (LCD) the least common multiple of the denominators in two or more fractions. Least Common Multiple (LCM) The smallest number, other than zero, that is a common multiple of two or more numbers Leg (of a right triangle) Either of the two sides that form the right angle in a right triangle Line Plot A graph showing the frequency of data on a number line Nonagon A polygon with nine sides Plane Aflat surface that extends infinitely in all directions Prime Number A whole number that has exactly two factors, 1 and itself Quadrants The four regions of a coordinate plane that are separated by the axes Radius A line segment that has one endpoint on a circle and the other endpoint in the center of the circle Range The difference between the greatest and least numbers in a set of data Rate A ratio that compares two quantities having different units (ex. 95 miles in 2 hours) Ratio A comparison of two numbers using division Regular Polygon A polygon that has all sides congruent and all angles congruent Repeating Decimal A decimal that has a repeating sequence of numbers after the decimal point, 0.333, o.3 Similar Polygons Polygons that have the same shape, but not necessarily the same size. Straight Angle An angle with a measure of 180 degrees Terminating Decimal a decimal that contains a finite number of digits Transformation The moving of a figure by a translation (slide), rotation (turn), or reflection (flip). Unit Price The price of a single item or amount (ex. $3.50 per pound) Unit Rate A rate with the second term being one unit (ex. 50 mi/gal., 4,5 km/sec) Venn Diagram A diagram that shows the relationships among sets of objects Whole Number Any of the numbers 0, 1, 2, 3, 4,... X-axis The horizontal line on a coordinate plane Y-axis The vertical line on a coordinate plane A review of fifth grade PSSA Vocabulary terms