# 7th Grade Math Vocabulary Flashcards

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Probability
Probability measures the chance that a certain event or outcome will occur. It is expressed as a ratio of actual events taking place over the total number of possible outcomes. For example, the probability of you winning the lottery might be one in one million, or 1/1,000,000.
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Percent
A percent is a measurement of 1 part of 100 and often followed by the percent sign (%). For example, if you score an 85% on a test, you correctly answered 85 out of 100 parts of the test.
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Population
Population is the total number of subjects (people, animals, plants, or things) that is under consideration. For example, we can talk about the population of the whole United States, or just the population of New York City, or the population of rabbits in South Dakota.
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Equilateral Triangle
An equilateral triangle is one whose three sides are all the same length.
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Estimate
An estimate is an approximate calculation rather than an exact number. For example, an electrician can give you an estimate of how much a job will cost before she does the job. The final cost may be more or less than the estimate. An estimate is 'in the ballpark' of what the actual cost will be.
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Commission
Commission is a fee that a person charges for a service. For example, a real estate broker charges a commission for helping a person find and buy a house.
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Circumference
Circumference measures the distance around the outside of a circle.
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Area
Area is the size of the surface of a 2- or 3-dimensional figure. It is measured in units squared.
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## Flashcard Content Overview

These flashcards give an overview of some math vocabulary words that 7th graders will need to know for high school math and for everyday life. From measuring the distance around a circle, to determining the likelihood that a certain event will occur, to understanding how taxes work, these flashcards will help prepare 7th graders for the real-world situations when they will need to know how to do certain kinds of math.

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Area
Area is the size of the surface of a 2- or 3-dimensional figure. It is measured in units squared.
Circumference
Circumference measures the distance around the outside of a circle.
Commission
Commission is a fee that a person charges for a service. For example, a real estate broker charges a commission for helping a person find and buy a house.
Estimate
An estimate is an approximate calculation rather than an exact number. For example, an electrician can give you an estimate of how much a job will cost before she does the job. The final cost may be more or less than the estimate. An estimate is 'in the ballpark' of what the actual cost will be.
Equilateral Triangle
An equilateral triangle is one whose three sides are all the same length.
Population
Population is the total number of subjects (people, animals, plants, or things) that is under consideration. For example, we can talk about the population of the whole United States, or just the population of New York City, or the population of rabbits in South Dakota.
Percent
A percent is a measurement of 1 part of 100 and often followed by the percent sign (%). For example, if you score an 85% on a test, you correctly answered 85 out of 100 parts of the test.
Probability
Probability measures the chance that a certain event or outcome will occur. It is expressed as a ratio of actual events taking place over the total number of possible outcomes. For example, the probability of you winning the lottery might be one in one million, or 1/1,000,000.
Rate
Rate is the ratio between two different kinds of units. For example, the rate of a moving car is measured in miles per hour, or miles/hour.
Scale Drawing
A scale drawing is a small drawing that is in proportion to a larger object. For example, before you build a house, you might make a scale drawing. This would help you determine the dimensions of the rooms and get an idea of where your furniture might go.
Tax
Tax is an amount of money collected by the government. You are usually taxed when you buy something or make money from a job. This money goes to pay for public goods, such as roads, schools, and libraries.
Unlikely event
An unlikely event is an event that is probably not going to happen. For example, it is an unlikely event that you will win \$57,000,000 in the lottery.
Broker
A broker is a person who buys or sells things for another person in exchange for a commission. For example, you might hire a real estate broker to help you find a house to buy.
Ratio
A ratio is a comparison that shows how much there is of one set of things compared to another set of things. For example, if I have 4 oranges and 7 apples, the ration of oranges to apples is 4:7.
Proportion
Proportion is a relationship between two things that are different sizes but have the same ratios. For example, a scale drawing of a car might be 1/16 the size of the actual car, but it's proportions will be the same.
2-Dimensional Figure
A 2-dimensional figure is a flat shape that only has height and width. A circle is an example of a 2-dimensional figure.
3-Dimensional Figure
A 3-dimensional figure is a shape that has width, depth, and height. A cube is an example of a 3-dimensional figure.

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