# 7th Grade Math Vocabulary Words

## 7th Grade Math Words

Students in 7th grade should know a lot of important math vocabulary words. Well enough to understand what the teacher and textbook are saying without having to look up every word. Mastery of these words is critical to understanding higher level mathematics. This lesson will not define every possible math word that 7th graders should know, but it will offer a good overview of some of the most important math terms for this grade.

## Area, Commission, & Estimate

Little Bobby is walking around his neighborhood. He sees an area in the playground that piques his interest. An **area** is a measure of a two-dimensional figure or the surface of a 3-dimensional figure that is denoted by square units. As he walks over to this area, he sees it's a circular playground. This playground has a **circumference** of 400 feet. The circumference is the distance around the circle.

In the playground, he overhears a mother talking about how her broker charges a huge **commission**. A commission is the fee that someone charges for their service, one that helps facilitate a transaction. The mom is fuming because the **estimate** the broker gave her for his commission was a lot less than what it turned out to be. The estimate is an approximate number or calculation.

Little Bobby is not interested in that stuff so he heads over to the tic-tac-toe game next to the slides. Instead of Xs, this game uses equilateral triangles. An **equilateral triangle** is a triangle whose three sides have the same exact length.

## Population, Probability, & Tax

Bobby gets bored at the playground and heads home. He turns on the TV and hears that the population in the U.S. has increased by 1% over the last year. The **population** is the entire collection of subjects, individuals, or items that is being considered. A **percent** is an expression of one part in a hundred. So, for example, 20% of the U.S. population is the same as 20 one-hundredths of the U.S. population.

Bobby has no idea how much 20% of the U.S. population is. He thinks that the probability anyone knows the answer off the top of their head is pretty much zero. The **probability** is the chance that some sort of outcome will come to fruition as measured against the total number of possible outcomes. Meaning, it's the ratio of actual occurrences over the total number of possible outcomes.

At any rate, and speaking of that, **rate** is a kind of ratio where one unit is compared to a different unit. As Bobby goes over to his dad's car to see if he can back it up into a tree for a viral news story, he can see 'mph' written on the dash. He knows this means miles per hour, or miles/hour. The two units of miles and hour are considered in relation to one another via a ratio.

Bobby gets bored in his dad's car as soon as he realizes he can't start it. So, he decides to go up to his room and draw a car backed into a tree instead. He knows he can't possibly draw the entire car in full size. Instead, he turns to a **scale drawing**, a drawing, of a car in this case, which shows the car and its parts in the same proportion to their actual size. As he's drawing, he overhears his parents debating how the next president is going to increase their taxes. A **tax** is a sum of money the government collects on income, a product, service, or activity that is the used to pay for public services, facilities, and infrastructure. His parents think that a tax increase is an **unlikely event**, which is an event that is probably not going to happen.

## Lesson Summary

The likelihood this lesson is over is 100%. Hopefully, you now know what a percent is along with a few of these words:

**Area**is a measure of a two-dimensional figure or the surface of a 3-dimensional figure that is denoted by square units**Circumference**, the distance around the circle.**Commission**, the fee that someone charges for their service**Estimate**, an approximate number or calculation.**Equilateral triangle**, a triangle whose three sides have the same exact length.**Population**, the entire collection of subjects, individuals, or items that is being considered.**Percent**, an expression of one part in a hundred.**Probability**, the chance that some sort of outcome will come to fruition as measured against the total number of possible outcomes.**Rate**, a kind of ratio where one unit is compared to a different unit.**Scale drawing**, a drawing that shows the object being drawn and its parts in the same proportion to their actual size.**Tax**, the sum of money the government collects on income, a product, service, or activity that is the used to pay for public services, facilities, and infrastructure.**Unlikely event**, an event that is probably not going to happen.

To unlock this lesson you must be a Study.com Member.

Create your account

### Register to view this lesson

### Unlock Your Education

#### See for yourself why 30 million people use Study.com

##### Become a Study.com member and start learning now.

Become a MemberAlready a member? Log In

Back*7th Grade Math Vocabulary Words*

Related Study Materials

- Computer Science: Help and Review
- General History Lessons
- General Science Lessons
- TExES Science of Teaching Reading (293): Practice & Study Guide
- Next Gen NCLEX-PN Study Guide & Practice
- General History
- Musical Instrument Instruction
- Choral Instruction
- Curriculum & Assessment in Music Education
- Strategies for Music Instruction
- How to Pass the CDA Test
- What is the CDA Test?
- IAAP CAP Test Day Preparation
- ILTS Test Score Information
- IAAP CAP Registration Information
- IAAP CAP Test Retake Policy
- IAAP CAP Test Score Information

##### Latest Courses

- Jomo Kenyatta: Biography & Facts
- Quadrat Method in Ecology: Definition & Equation
- Role of the Skin in Homeostasis & Immunity
- Hijab: Definition and Relation to Islam
- Gnosticism: Definition & History
- Realpolitik: Definition, Meaning & Diplomacy
- Tax Considerations and Forms for Military Members
- Quiz & Worksheet - Analyzing the Treaty of Paris
- Quiz & Worksheet - Egyptian God Ammut the Devourer
- Quiz & Worksheet - Reconciling Subledger & General Ledger for Accounts Payable & Accrued Liabilities
- Quiz & Worksheet - Positions, Planes & Cavities Terms in Anatomy
- Flashcards - Real Estate Marketing Basics
- Flashcards - Promotional Marketing in Real Estate
- Common Core English & Reading Worksheets & Printables
- Technology in the Classroom

##### Latest Lessons

- Business Math: Skills Development & Training
- Philosophy 101: Intro to Philosophy
- AEPA English Language Arts (NT301): Practice & Study Guide
- Prentice Hall Physical Science: Online Textbook Help
- College Algebra Textbook
- Homeschool Resources for The Great Gatsby
- War Campaign Strategies in 1862: Help and Review
- Quiz & Worksheet - Brand Message
- Quiz & Worksheet - Critical Thinking Exercises
- Quiz & Worksheet - Marketing Niche
- Quiz & Worksheet - Role of Place in the Marketing Mix
- Quiz & Worksheet - Role of Testimonials in Advertising

##### Popular Courses

- What Are Business-to-Business Sales? - Definition, Process & Techniques
- Electronic Data: Accuracy & Integrity
- Florida State Standards for Math
- CHPN Certification Requirements
- 504 Plans in California
- Next Generation Science Standards in Massachusetts
- How to Pass the Algebra Regents Exam
- How to Pass the MPRE Exam
- Math Fraction Games
- Where Can You Meet Other Homeschool Parents?
- Response to Intervention (RTI) in Florida
- Indiana Biology Standards

##### Popular Lessons

##### Math

##### Social Sciences

##### Science

##### Business

##### Humanities

##### Education

##### History

##### Art and Design

##### Tech and Engineering

- Tech and Engineering - Videos
- Tech and Engineering - Quizzes
- Tech and Engineering - Questions & Answers