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EnchantedLearning.com Math Dictionary

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V is for ...

V V equals 5 in Roman numerals.

variable A variable is an unknown or placeholder in an algebraic expression. For example, in 2x+y, x and y are variables.

vector A vector is a number (a magnitude) together with a direction (compare with scalar). A vector can be represented by an arrow whose length represents the magnitude and whoses direction represents the direction of the vector. For example, velocity is a vector; velocity tells you how fast something is traveling, and its direction.

Venn diagram A Venn diagram is a diagram that uses overlapping circles to show relationships among sets of things.

vertex A vertex of an angle is the point at which the two sides of the angle meet. A vertex of a polygon is a point at which two of the sides meet. A vertex of a polyhedron is a point at which 3 or more faces meet.

Object Volume Cube (length of side)3 Rectangular prism length x width x height Sphere (4/3)πr3 Cylinder πr2(height of cylinder) Cone (1/3)πr2(height of cone) Square-base Pyramid (1/3)base2(height of pyramid) volume Volume is a measure of 3-dimensional space expressed in cubic units.

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EnchantedLearning.com Math Dictionary

x, ÷

A

B

C

D

E

F

G

H

I

J

K

L

M

N

O

P

Q

R

S

T

U

V

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Counting

Addition

Subtraction

Multiplication

Division

Number Line

Fractions

Decimals

Graphs

Measurement

Rounding

Click on an underlined word for more information on that subject. If the math term you are looking for is not in the dictionary, please e-mail us.

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