Key takeaway: Grade 8 math vocabulary lists 43 words of eighth grade, including scientific notation, slope, slope-intercept form, function, dilation, Pythagorean Theorem and scatter plot.
Eighth grade is the bridge to high school algebra. Students meet irrational numbers, describe lines with slope and y-intercept, solve systems of two equations and move shapes with translations, reflections, rotations and dilations. This Grade 8 math vocabulary list puts all of those words side by side.
Read the definitions topic by topic, or open a term to see its formula, a figure and a solved problem with the reasoning written out.
43 terms on this page, each with a definition, a figure and a worked example.
Grade 8 Math Vocabulary: the full list
Numbers and Operations
- Cube Root 8.EE.A.2
- Exponent Rules 8.EE.A.1
- Irrational Number 8.NS.A.1
- Negative Exponent 8.EE.A.1
- Perfect Square 8.EE.A.2
- Real Numbers 8.NS.A.1
- Scientific Notation 8.EE.A.3
- Square Root 8.EE.A.2
- Zero Exponent 8.EE.A.1
Expressions and Equations
- Elimination Method 8.EE.C.8b
- Linear Equation 8.EE.C.7
- Substitution Method 8.EE.C.8b
- System of Equations 8.EE.C.8
Functions and Graphs
- Function 8.F.A.1
- Linear Function 8.F.A.3
- Nonlinear Function 8.F.A.3
- Rate of Change 8.F.B.4
- Slope 8.EE.B.5
- Slope Formula 8.EE.B.6
- Slope-Intercept Form 8.EE.B.6
- Y-Intercept 8.F.B.4
Geometry and Measurement
- Alternate Interior Angles 8.G.A.5
- Congruent Figures 8.G.A.2
- Corresponding Angles 8.G.A.5
- Dilation 8.G.A.3
- Distance Formula 8.G.B.8
- Exterior Angle Theorem 8.G.A.5
- Hypotenuse 8.G.B.6
- Pythagorean Theorem 8.G.B.7
- Pythagorean Triple 8.G.B.7
- Reflection (Geometry) 8.G.A.1
- Rotation (Geometry) 8.G.A.1
- Similar Figures 8.G.A.4
- Translation (Geometry) 8.G.A.1
- Transversal 8.G.A.5
- Triangle Angle Sum Theorem 8.G.A.5
- Volume of a Cone 8.G.C.9
- Volume of a Cylinder 8.G.C.9
- Volume of a Sphere 8.G.C.9
Statistics and Data
- Line of Best Fit 8.SP.A.2
- Relative Frequency 8.SP.A.4
- Scatter Plot 8.SP.A.1
- Two-Way Table 8.SP.A.4