# 7th & 8th Grade TAKS Math Vocabulary

## 60 terms · These are words you need to know and will likely see on the 7th and 8th grade TAKS Math tests. Thanks to Mrs. Angelo from Marshall for the list.

### acute angle

An angle measuring more than zero degrees and less than 90 degrees

### congruent

Having the same size and shape

### difference

The amount that remains after one number has been subtracted from another

### exponent

A number that tells how many times the base is multiplied by itself

### reciprocal

The inverse of a fraction; when multiplied by the original fraction, it results in a product that equals one

### vertex (vertices - plural)

The point of intersection for two sides of a plane figure, three sides of a solid figure, or the endpoints of two rays that form an angle.

### expression

A combination of numbers and variables connected by one or more operations signs

### polygon

Three or more line segments in a plane that forms a closed figure. The line segments never cross but meet at their endpoints.

### product

The result of muliplying two or more numbers

### hexagon

A polygon with six sides.

### range

The difference between the least and greatest values in a set of numbers

### scalene triangle

A triangle with sides of different lengths and no two angles are the same

### area

Surface space that is measured in square units

### perimeter

The distance around a figure

### circumference

The distance around a circle (the perimeter of a circle)

### straight angle

An angle that measures 180 degrees

### obtuse angle

An angle measuring more than 90 degrees and less than 180 degrees

### complementary angle

Two angles whose sum equals 90 degrees

### diameter

A line segment that passes through the center of a circle and has its endpoints on the circle

### sum

The total of two or more numbers being added

### quotient

The result of dividing one number by another; the solution to a division problem

### dividend

In a division problem, it's the number being divided

### divisor

In a division problem, the number that an amount is divided by

### mean

The sum of a group of numbers divided by the number of numbers; also known as the average

### median

A value found by ordering a group of data from least to greatest and choosing the middle value of the group.

### mode

In a group of values, the value that occurs most often

### pyramid

A solid figure that has triangles for its sides and a polygon as its base

A polygon that has four sides

### parallelogram

a quadrilateral with two pairs of congruent, parallel sides

### rectangle

A parallelogram with four right angles

### reflection

A mirror image of a figure shown over a line of reflection

### rate

A ratio that compares two different types of quantities

### equation

A mathematical sentence that uses an equal sign

### scale drawing

A drawing of an object that is different in size (usually smaller than the original) but keeps the same proportions

### trapezoid

A quadrilateral with one pair of parallel sides

### cylinder

A solid figure with two congruent and parallel circular bases

### octagon

An eight-sided polygon

### pentagon

A polygon with five sides

### percent

The ratio of a number to 100 (per one hundred); the symbol %

### similar figures

Figures that have the same shape but different sizes; their sides are proportional, while their corresponding angles are equal

### equilateral triangle

A triangle that has three equal sides and three equal angles

A length that is half the diameter of a circle; the distance from the center of the circle to the circle itself

### isosceles triangle

A triangle with two equal sides and two equal angles

### right triangle

A triangle with one right angle

### supplementary angles

Two angles whose sum is 180 degrees

### order of operations

Rules that tell which steps to follow when solving an expression

### rhombus

A parallelogram with all sides equal and congruent

### lowest terms

A fraction with all common factors (other than 1) factored out of the numerator and denominator

### square root

A number that when multiplied by itself results in the original number

### prism

a solid figure that has two congruent, parallel polygons as its bases. Its sides are parallelograms.

### ratio

A comparison of the two values of two numbers

### proportion

An equation stating that two ratios are equal

### simplify

To make a fraction easier to work with by taking out common factors

### unit ratio

A ratio that shows the cost per unit of measure

One of the four regions formed by the intersection of the axes of a coordinate graph

### x-axis

The horizontal number line of a coordinate graph

### y-axis

The vertical number line of a coordinate graph

### x-coordinate

The value on the x-axis used to locate a point on the coordinate graph. It is the first value in an ordered pair.

### y-coordinate

The value on the y-axis used to locate a point on the coordinate graph. It is the second value in an ordered pair.

### ordered pair

Two numbers listed in a specific order; it describes a point on the coordinate graph