• Cube root

• A number that must be multiplied by itself three times to obtain a given number.

this is s

aid

“cube ro

ot of 8

”

Right triangle

A triangle with one angle measuring 90°.

Right angle

Right angle

An angle that measures exactly 90°.

𝟗𝟎°

Leg

• Either of the legs connected to the base of a trapezoid or triangle.

legs

Hypotenuse

The side opposite the right angle in a right triangle.

Hypotenuse

Trigonometric

• Of or relating to the principles of trigonometry. Studies relationships involving lengths and angles of triangles.

𝒕𝒂𝒏𝜽=𝒔𝒊𝒏𝜽𝒄𝒐𝒔 𝜽

𝒔𝒆𝒄 𝜽=𝟏

𝒄𝒐𝒔𝜽 𝒄𝒔𝒄 𝜽=𝟏

𝒔𝒊𝒏 𝜽

𝒄𝒐𝒕 𝜽=𝟏

𝒕𝒂𝒏𝜽=𝒄𝒐𝒔𝜽𝒔𝒊𝒏𝜽

Cubed

Raised to the third power.

Expanded notation

Writing a number to show the value of each digit.

129,347(1 x 100,000) + (2 x 10,000) + (9 x 1000) +

(3 x 100) + (4 x 10) + (7 x 1)

Expanded notation

Integer exponent

An exponent that is any integer, positive, negative or 0.

exponentX3

Radical

The symbol , which is used to represent the square root or “nth” of a number.

√

Mathematics Vocabulary - Grade 7

©Partners for Learning, Inc.

Real number

The set of all rational and irrational numbers.

Power of ten

• A number with 10 as a base and a whole-number exponent.

106

Tenth power

Raising a number to the tenth power is multiplying a number by itself 10 times.

Scientific notation

Scientific notation is a way to write a number as the product of a number between 1 and 10 and a power of 10.

written in scientific notation would be:

• Logarithm

• The logarithm base (b ) of a number (x ) is the power to which b must be raised in order to equal x.𝑙𝑜𝑔𝑏 𝑥

• Irrational numbers

• Numbers that cannot be written as a single fraction. The decimal goes on forever without repeating.

• Terminating decimal

• A decimal that end at some point.

𝟑𝟏𝟐

=.𝟏𝟐

𝟏𝟖=.𝟏𝟐𝟓

𝟗𝟏𝟔 =.𝟓𝟔𝟐𝟓

Rational number

Any number that can be written as a fraction.

-4 634

5.5

• Repeating decimal

• A decimal with a sequence of digits that repeats itself indefinitely.

77600=0 .128333

Mathematics Vocabulary - Grade 7

©Partners for Learning, Inc.

Prime factorization

The expression of a number as the product of prime factors.