7th Grade Math Vocabulary
In short: 7th grade math vocabulary: 41 terms on proportional relationships, rational numbers, equations, angles, and probability, each defined in plain words with an example to check a problem or review before a test.
Seventh grade moves from arithmetic toward algebra, and the 7th grade math vocabulary grows with it: proportional relationship, constant of proportionality, rational number, inequality, complement, sample space. This page defines each term briefly and shows it in a small example so you can see exactly how it is used.
Use it while you work through a worksheet: when a problem says “simplify” or “identify the scale factor,” look up the word and move on. Before a test, print the pages and cover the definitions to quiz yourself. Spotting which words still feel fuzzy is the quickest way to decide what to review.
41 words on this page, each with a definition, a figure, a solved example and two quick questions.
7th Grade Math Vocabulary: the full list
Numbers and Operations
Ratios and Percents
- Commission
- Constant of Proportionality
- Cross Multiplication
- Discount
- Markup
- Percent Change
- Percent Decrease
- Percent Error
- Percent Increase
- Proportion
- Proportional Relationship
- Sales Tax
- Simple Interest
Algebra
Geometry
- Adjacent Angles
- Area of a Circle
- Circumference
- Complementary Angles
- Cross Section
- Pi (π)
- Radius and Diameter
- Scale Drawing
- Scale Factor
- Supplementary Angles
- Triangle Inequality Theorem
- Vertical Angles
Statistics
Probability
- Compound Event
- Experimental Probability
- Probability
- Sample Space
- Simulation
- Theoretical Probability
- Tree Diagram