Skip to ContentGo to accessibility pageKeyboard shortcuts menu
OpenStax Logo
Prealgebra 2e

Key Terms

Prealgebra 2eKey Terms
Search for key terms or text.

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 nn numbers is the arithmetic average of the numbers. The formula is mean=sum of values in data setnmean=sum of values in data setn
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 aa to bb is written aa to bb, abab, or a:ba: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.
PreviousNext
Order a print copy
Citation/Attribution

This book may not be used in the training of large language models or otherwise be ingested into large language models or generative AI offerings without OpenStax's permission.

Want to cite, share, or modify this book? This book uses the Creative Commons Attribution License and you must attribute OpenStax.

Attribution information
  • If you are redistributing all or part of this book in a print format, then you must include on every physical page the following attribution:
    Access for free at https://openstax.org/books/prealgebra-2e/pages/1-introduction
  • If you are redistributing all or part of this book in a digital format, then you must include on every digital page view the following attribution:
    Access for free at https://openstax.org/books/prealgebra-2e/pages/1-introduction
Citation information

© Feb 17, 2025 OpenStax. Textbook content produced by OpenStax is licensed under a Creative Commons Attribution License . The OpenStax name, OpenStax logo, OpenStax book covers, OpenStax CNX name, and OpenStax CNX logo are not subject to the Creative Commons license and may not be reproduced without the prior and express written consent of Rice University.