# Harder Math Vocabulary Words

### 25 terms by caprerikids

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### chord

a straight line connecting two points on a curve

### circumference

the distance around the outside of a circle

### composite number

a whole number greater than 1 that has more than two factors

### diameter

the distance across a circle through its center

### expanded notation

A way to write numbers that shows the value of each digit

### greatest common factor

The largest factor that two or more numbers have in common.

### heptagon

a seven-sided polygon

### histogram

a bar graph that shows the frequency of data within equal intervals

### hypotenuse

the longest side of a right triangle

### least common denominator

The least common multiple of the denominators of two or more fractions.

### least common multiple

the smallest multiple that is exactly divisible by every member of a set of numbers

### nonagon

a nine-sided polygon

### plane

A flat surface that goes on forever in all directions

### prime number

A whole number that has exactly two factors, 1 and itself.

four regions into which a coordinate plane is divided by the x-axis and the y-axis

the length of a line segment between the center and circumference of a circle or sphere

### rate

the relative speed of progress or change

### ratio

the relative magnitudes of two quantities (usually expressed as a quotient)

### regular polygon

a polygon with all sides and all angles equal

### repeating decimal

a decimal with a sequence of digits that repeats itself indefinitely

### similar polygons

polygons that are the same shape but different sizes

### straight angle

an angle of 180 degrees

### terminating decimal

a decimal whose digits end

### unit price

The price of a single item or amount (e.g., \$3.50 per pound).

### whole number

a number without fractions; an integer.

Example: