L to J 7th Grade Math Vocabulary

Parallel

Always the same distance apart and never touching

Straight Angle

An angle that measures exactly 180°

Order of Operations

Another name for: PEMDAS

Approximate

Another word for round (typically to the nearest whole number)

Face

Any of the individual flat surfaces of a solid object

Variable

The letter that is in expressions and equations is called a ___

X-Axis

The line on a graph that runs horizontally (left-right) through zero.

Y-Axis

The line on a graph that runs vertically (up-down) through zero.

Adjacent

Two angles that share a common ray (side by side)

Supplementary Angles

Two angles whose sum is exactly 180 degrees

Complementary Angles

Two angles whose sum is exactly 90 degrees

Vertical Angles

Two congruent angles formed by intersecting lines

Proportion

Two equivalent ratios are called a ______.

Dependent Probability

Two events where the first event DOES affect the second event

Independent Probability

Two events where the first event DOES NOT affect the second event

Ordered Pair

Two numbers written in parentheses which show the position on a graph. The "x" value is first, and the "y" value is second.

Composite Shape

Two-Dimensional shape made up of multiple basic shapes

Vertical

Up and down.

Less Than

What does this symbol mean? <

Greater Than

What does this symbol mean? >

C=π d or C=2π r

What is the formula for Circumference of a circle?

A = πr2

What is the formula for the area of a circle?

A = bh

What is the formula to find the area of a rectangle?

A = ((b1 + b2)h)/ 2

What is the formula to find the area of a trapezoid?

K = y/x

What is the formula to find the constant of proportionality?

Distributive

What property is this: -4(5x + 3)

Flip the Inequality

When solving inequalities, you must do this when you divide or multiply by a negative?

Non-Proportional

When the ratio of y/x is not constant and does not contain the point (0, 0) on a graph or table.

Origin

Where the X axis and Y axis cross on a two-dimensional graph, the starting point

Reciprocal

The "flip" of a fraction

Dividend

The amount that you want to divide up

Quotient

The answer to a division problem.

Product

The answer when two or more values are multiplied together

Mean

The average of all the data points (add all and divide by how many there are)

Denominator

The bottom number in a fraction

Base (of a shape)

The bottom of a shape, solid or three dimensional object

Rate of Change

The constant repeated change

Range

The difference between the lowest and highest values

Interquartile Range

The difference in the 3rd and 1st Quartiles in a Data set

Range

The difference in the largest and smallest data points in a set

Circumference

The distance around a circle

Diameter

The distance from one edge of a circle, through the center, to the other edge

Quadrant

The four areas created by the x axis and the y axis on the coordinate plane.

Biased Sample

a sample drawn in a way that one or more parts of the population are favored over others

The Number we use for Pi

3.14.....

Ratio

A comparison of two quantities.

Term

A constant, variable, or a coefficient together with a variable.

Dot Plot

A diagram of a data set plotted on a number line.

Number Line

A diagram of numbers in order on a horizontal or vertical line.

Expression

A group of terms and operators.

Absolute Value

A number's distance from zero.

Percent

A part-to-whole ratio with a whole of 100.

Sales Tax

A percent of anything you buy that is added onto the cost

Simple Interest

A percentage of the original amount.

Tip

A percentage of your bill that you pay to the server for their service at a restaurant.

Vertex

A point where two or more line segments meet. A corner.

Unit Rate

A rate with a denominator of one (second quantity is one)

Rate

A ratio of quantities in different units.

Pyramid

A solid object with triangle sides, an apex, and a polygon base.

Prism

A solid object with two identical ends and flat sides

Equation

A statement that two expressions are equal in value

Nets

A two-dimensional model of a three-dimensional solid.

Mean

Average

Inequality

Compares two values, showing if one is less than, greater than, or simply not equal to another value

Area

Definition for: How much it takes to cover a 2D shape is called its ____.

Surface Area

Definition for: How much it takes to cover a 3D figure is called its ____ _____.

Volume

Definition to: how much it takes to fill up a 3D figure is called its ______.

Perimeter

Distance around the outside of a shape.

Equivalent

Equal in value

A = bh 2 A = ½bh

Formula for area of a Triangle is:

Horizontal

Going side-to-side, like the horizon

Radius

Halfway across a circle (from the center to a point on the edge of a circle)

Probability

How likely or unlikely an event is.

Coefficient

In equations and expressions, the number being multiplied to the variable is called the _____.

Constant

In equations and expressions, the number by itself is called the _____.

Like Terms

Terms that have the same exponent to the same power.

Distance

Length. A measurement of how far through space.

Inverse Operation

Math operation that "undoes" the other (use this to move numbers from one side of an equation to the other)

Spread

Measures of the numbers in a data set relative to the center.

Median

Middle number in a set of data

Mode

Number that shows up the most in a set of data

Factor

Numbers we can multiply together to get another number

Integer

Positive and negative whole numbers

Theoretical Probability

Probability based on mathematical reasoning

Experimental Probability

Probability calculated from observation.

Substitution

Putting values in the place of a variable.

Exponent

The number of times a number is multiplied by itself

Base (exponents)

The number that gets multiplied when using an exponent.

Divisor

The number we divide by

Coordinate Plane

The plane containing the "x" axis and "y" axis.

Scale

The ratio to either increase or decrease dimensions or sizes

Sum

The result of adding two or more numbers.

Multiple

The result of multiplying a number by an integer (not by a fraction)

Difference

The result of subtracting one number from another

Perpendicular

The symbol is ⊥. Lines that meet at right angles (90°).

Numerator

The top number in a fraction

Quartile

The values that divide a list of numbers into quarters.

Simplify

To reduce to simplest form

Whole

Which word is missing: Part = % x 100

Terminating Decimal

a decimal whose digits end, can be written as a fraction with a power of 10 denominator