8th Grade Math Vocabulary test prep

A polygon with equal sides and angles.

a² + b² = c²

A shape where all points are same distance from center.

When you add the same number to each side of equation.

Parts of similar or congruent figures that match.

A relation in which each member of the domain is paired with only one member of range.

The distance across a circle through the center.

A line that is very close to most of the points in a scatter plot.

The difference between the first and third quartiles.

Half of a sphere.

The horizontal change (x) between any 2 points on a line.

The ________________ of 25 is 5.

Data with 2 variables.

A simple, closed figure formed by 3 or more line segments.

Angles that are in the same position on 2 parallel lines in relation to transversal.

A ratio of something out of 100.

A polyhedron with 2 parallel congruent faces called bases.

Operations that undo each other, opposites of each other.

The average of absolute values of the differences between the mean and each value in set.

Two lines that intersect to form right angles.

The area of all the lateral faces of a solid.

The distance around outside of circle.

Angles that share a common vertex and side.

A graph that shows the median, quartiles, and extremes of data.

The distance from the center of the circle to any point on the circle.

A equation, graph , table, or function that fall in a straight line.

The original figure before a transformation.

Exterior angles on opposite sides of transversal.

An angle whose measure is more than 90 but less than 180 degrees.

Two angles that add to 90 degrees.

A mathematical sentence stating 2 quantities are equal.

The set of y coordinates in a relation.

When you multiply both sides of equation by same number.

A transformation that enlarges or reduces a figure by scale factor.

A flat surface of a polyhedron, not on the bottom.

The number or numbers that appear the most in a set of data.

A combination of variables, numbers, and at least one operation.

A pair of numbers used to locate point in coordinate plane(x,y).

The vertical change(y) between any 2 points on a line.

When you multiply a number by itself.

A triangle with no equal sides or angles.

2/3 and 3/2

The chance that an event will happen.

When you divide both sides of the equation by the same number.

The ratio of the lengths of 2 corresponding sides of 2 similar figures.

(9+3)+2 = 9+(3+2)

The slanted side opposite the right angle in a right triangle.

Data that can be measured or given a numerical value.

3.1415926............

A function whose rate of change is not constant and does not make a straight line.

An angle whose measure is less than 90 degrees.

A compact way of writing very large or very small numbers. 500,000= 5 x 10 or 0.00005= 5 x 10^-5

A transformation in which a figure is turned about a fixed point.

Figures that are same shape but not same size.

When a shape has equal angles and sides.

The 10 in 10 to the 3rd power or the bottom shape of a figure.

A transformation where a figure is flipped over a line.

A mathematical sentence that contains <, >, or =.

A triangle with 2 equal sides and angles.

The x coordinates in a relation.

The same size and shape.

Data that are much larger or smaller than other numbers.

A number that can be written as a fraction, for example: 2,-10.5, 4/3, 1.666666..., etc

The sum of the data divided by the number of items in the set.

The numerical factor of a term that contains a variable. The 2 in 2x.

Any 3 dimensional figure with faces that are polygons.

A 3 dimensional figure with one circular base and single vertex.

The 3 in 10 to the 3rd power.

A polyhedron with with one base a polygon and 3 triangular faces that meet at a common vertex.

The number in the middle of an ordered set of data.

The 2 sides of a right triangle that form the right angle.

5(x + 3) = 5x + 15

A figure or solid that is made up of more than one shape.

An angle with exactly 90 degrees.

A 3 dimensional figure with 2 congruent circular bases.

A term without a variable.

When an equation has no solution.

Lines that never intersect.

Interior angles that are on opposite sides of transversal.

The rate of change between any 2 points in a linear relationship is same.

When you multiply a number by itself 3 times.

2 x 3= 3 x 2

The line segment where 2 faces intersect in polyhedron.

The resulting figure after a transformation.

A number that cannot be expressed as a fraction. For example: pi, square root of 2, etc.