Meaning: A three-sided polygon.

Part of speech: noun

Example: The triangle has three angles.

Category: Mathematics › Geometry

Synonyms: three-sided shape

Meaning: Having three sides or angles.

Part of speech: adjective

Example: The table has a triangular shape.

Category: Mathematics › Geometry

Synonyms: three-sided

Meaning: A branch of mathematics dealing with the relationships between the angles and sides of triangles.

Part of speech: noun

Example: He studied trigonometry in high school.

Category: Mathematics › Geometry

Synonyms:

• math
• geometry

Meaning: A three-dimensional geometric figure with three faces.

Part of speech: noun

Example: The trihedron is a basic shape in geometry.

Category: Mathematics › Geometry

Synonyms: three-faced solid

Meaning: The number equivalent to one thousand billion (1,000,000,000,000).

Part of speech: noun

Example: The company's revenue reached a trillion dollars.

Category: Mathematics › Numbers

Synonyms: thousand billion

Meaning: Consisting of three parts or elements.

Part of speech: adjective

Example: The triple layer cake was delicious.

Category: Mathematics › Numbers

Synonyms:

• threefold
• tripartite

Meaning: The number following eleven.

Part of speech: noun

Example: There are twelve months in a year.

Category: Mathematics

Synonyms: dozen

Meaning: The number following nineteen.

Part of speech: noun

Example: There are twenty students in the class.

Category: Mathematics

Synonyms:

• twenty-one
• twenty-two

Meaning: The ordinal number for twenty.

Part of speech: adjective

Example: She was born on the twenty first of July.

Category: Mathematics

Synonyms: 21st

Meaning: The number following one.

Part of speech: noun

Example: I have two cats.

Category: Mathematics

Synonyms: pair

Meaning: Having length and width but no depth.

Part of speech: adjective

Example: The drawing is two dimensional.

Category: Mathematics

Synonyms:

• flat
• planar

Antonyms: three-dimensional

Meaning: Involving only one element or component.

Part of speech: adjective

Example: A unary operation requires only one operand.

Category: Mathematics

Synonyms:

• single
• onefold

Antonyms:

• binary
• multiple

Meaning: A set that contains all objects or elements under consideration.

Part of speech: noun

Example: In set theory, the universal set is fundamental.

Category: Mathematics › Set Theory

Meaning: a diagram showing all possible logical relations between a finite collection of sets

Part of speech: noun

Example: We used a Venn diagram to compare the two groups.

Category: Mathematics › Logic

Synonyms: set diagram

Meaning: The highest point; the top.

Part of speech: noun

Example: The vertex of the mountain was covered in snow.

Category: Mathematics › Geometry

Synonyms:

• peak
• summit

Meaning: Upright; at a right angle to the horizon.

Part of speech: adjective

Example: The vertical line on the graph represents time.

Category: Mathematics › Geometry

Synonyms:

• upright
• perpendicular

Antonyms: horizontal

Meaning: a fraction where the numerator is less than the denominator

Part of speech: noun

Example: One-half is a vulgar fraction.

Category: Mathematics

Synonyms: simple fraction

Meaning: A number without fractions; an integer.

Part of speech: noun

Example: Five is a whole number.

Category: Mathematics › Numbers

Synonyms: integer

Meaning: angles that form a Z shape

Part of speech: noun

Example: The two lines created Z angles when they intersected.

Category: Mathematics

Meaning: the number 0

Part of speech: noun

Example: Zero is the starting point in mathematics.

Category: Mathematics

Synonyms:

• nil
• nothing

Antonyms:

• one
• positive