48 terms

# Math words

Here is some vocabulary you might see in your math class!
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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
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
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
scale drawing
A drawing of an object that is different in size (usually smaller than the original) but keeps the same proportions
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. PEMDAS
rhombus
A parallelogram with all sides equal and congruent. Looks like a diamond or a square that fell over.
square root
A number that when multiplied by itself results in the given number.
proportion
An equation stating that two ratios are equal
simplify
To make a fraction easier to work with by taking out common factors
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