5.9.1: Key Terms

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May 28, 2023
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- 5.9: Chapter Review
- 5.9.2: Key Concepts

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Key Terms

circumference of a circle: The distance around a circle is called its circumference.

diameter of a circle: A diameter of a circle is a line segment that passes through a circle’s center connecting two points on the circle.

equivalent decimals: Two decimals are equivalent decimals if they convert to equivalent fractions.

mean: The mean of a set of $n$ numbers is the arithmetic average of the numbers. The formula is $mean = sum of values in data \frac{set}{n}$

median

The median of a set of data values is the middle value.

Half the data values are less than or equal to the median.
Half the data values are greater than or equal to the median.

mode: The mode of a set of numbers is the number with the highest frequency.

radius of a circle: A radius of a circle is a line segment from the center to any point on the circle.

rate: A rate compares two quantities of different units. A rate is usually written as a fraction.

ratio: A ratio compares two numbers or two quantities that are measured with the same unit. The ratio of $a$ to $b$ is written $a$ to $b$ , $\frac{a}{b}$ , or $a : b$ .

repeating decimal: A repeating decimal is a decimal in which the last digit or group of digits repeats endlessly.

unit price: A unit price is a unit rate that gives the price of one item.

unit rate: A unit rate is a rate with denominator of 1 unit.

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