# PSSA Math Terms Grades 5 & 6

## 33 terms · Practice your PSSA Math terms here!

### 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 (ex. 4372 = 4000 + 300 + 70 + 2)

### greatest common factor

the largest factor that 2 or more numbers have in common

### heptagon

a polygon with 7 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 opposite the right angle)

### least common denominator

the least common multiple of the denominators in two or more fractions

### least common multiple

the smallest number, other than zero, that is a common multiple of two or more numbers

### leg

either of the sides that form a right angle in a right triangle

### line plot

a graph showing the frequency of data on a number line

### nonagon

a polygon with 9 sides

### plane

a flat surface that extends infinitely in all directions

### prime number

a whole number that has exactly two factors, 1 and itself

the four regions of a coordinate plane that are separated by the axes

a line segment that has one endpoint on a circle and the other endpoint at 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

### 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

### 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 translation, rotation, or reflection

### unit price

the price of a single item or amount

### unit rate

a rate with the second term being one unit

### venn diagram

a diagram that shows relationships among sets of objects

### whole number

any of the numbers 0, 1, 2, 3, 4, 5...

### x-axis

the horizontal number line on a coordinate plane

### y-axis

the vertical number line on a coordinate plane