# Math Vocabulary Words and Mathematical Terms in English

Many people work in a job where some sort of mathematical knowledge or speech is required. If you are working with native English speakers, it is important that you can effectively convey what you mean when referring to math.

There are many uses for math vocabulary in your general conversations as well, things as simple as shopping may require basic math and in this section, you will learn all the vocabulary you will need to talk about math in English.

## Math Vocabulary/ Math Terms

### List of Mathematics Vocabulary Words

• Straight line
• Perpendicular
• Curve
• Arc
• Circle
• Diameter
• Section
• Square
• Rectangle
• Diagonal
• Right triangle
• Oval
• Center
• Whole
• A half (1/2)
• A quarter (1/4)
• Cube
• Cylinder
• Pyramid
• Cone
• Parallel lines

### Math Vocabulary Words with Examples and Pictures

These useful Mathematical terms with video lessons help English students and ESL learners improve their English vocabulary.

#### Straight line

• A line that extends infinitely in both directions, with all points on the line being equidistant from each other.
• Example: The straight line was used to measure the distance between two points.

#### Perpendicular

• Two lines that intersect at a 90-degree angle, forming four right angles.
• Example: The perpendicular lines formed the corners of the square.

#### Curve

• A line that bends or changes direction, often forming a smooth and flowing shape.
• Example: The curve of the road followed the contours of the hillside.

#### Arc

• A portion of a curve, often measured in degrees or radians.
• Example: The arc of the rainbow spanned the sky, creating a beautiful and colorful display.

#### Circle

• A closed curve with all points equidistant from a central point, often used in geometry and mathematics.
• Example: The circle was drawn with a compass, creating a perfect round shape.

• The distance from the center of a circle to any point on the circumference, often used in geometry and mathematics.
• Example: The radius of the circle was six inches.

#### Diameter

• The distance across a circle, passing through the center, often used in geometry and mathematics.
• Example: The diameter of the circle was twelve inches.

#### Section

• A part or portion of something that has been divided or separated.
• Example: The section of the cake was cut into small pieces and served to the guests.

#### Square

• A four-sided polygon with equal sides and angles, often used in geometry and mathematics.
• Example: The square had sides that were each eight inches long.

#### Rectangle

• A four-sided polygon with opposite sides that are equal in length and parallel, often used in geometry and mathematics.
• Example: The rectangle had a length of ten inches and a width of six inches.

#### Diagonal

• A straight line that connects two opposite corners of a polygon, often used in geometry and mathematics.
• Example: The diagonal of the square was the longest distance between any two points.

#### Right triangle

• A triangle with one 90-degree angle, often used in geometry and mathematics.
• Example: The right triangle had a hypotenuse that was twice as long as one of the legs.

#### Oval

• A closed curve that resembles an elongated circle, often used in geometry and mathematics.
• Example: The oval was drawn with a pair of compasses, creating a symmetrical and smooth shape.

#### Center

• The point that is equidistant from all points on a circle or sphere, often used in geometry and mathematics.
• Example: The center of the circle was marked with a dot.

#### Whole

• The complete amount or quantity of something, without any parts missing or removed.
• Example: The whole cake was decorated with frosting and candles.

#### A half (1/2)

• One of two equal parts of a whole, often used in fractions and mathematics.
• Example: She cut the sandwich in half, giving one piece to her friend.

#### A quarter (1/4)

• One of four equal parts of a whole, often used in fractions and mathematics.
• Example: The pizza was sliced into quarters, with each piece having the same amount of toppings.

#### Cube

• A three-dimensional shape with six square faces of equal size, often used in geometry and mathematics.
• Example: The cube had a volume of 27 cubic inches.

#### Cylinder

• A three-dimensional shape with two circular faces of equal size and a curved surface, often used in geometry and mathematics.
• Example: The cylinder had a volume of 100 cubic inches.

#### Pyramid

• A three-dimensional shape with a base that is a polygon and triangular faces that meet at a common vertex, often used in geometry and mathematics.
• Example: The pyramid had a height of 10 inches and a volume of 120 cubic inches.

#### Cone

• A three-dimensional shape with a circular base and a curved surface that tapers to a point, often used in geometry and mathematics.
• Example: The cone had a height of 8 inches and a volume of 50 cubic inches.

#### Parallel lines

• Two lines that are always the same distance apart and never intersect, often used in geometry and mathematics.
• Example: The parallel lines were drawn with a ruler, creating a perfectly straight and even spacing.

### Mathematics Symbols Vocabulary

Mathematics is used to communicate information about a wide range of different subjects.

This is a list of common Math symbols found in all branches of mathematics to express a formula or to represent a constant.

• Subtraction
• Multiplication
• Division
• Plus-minus
• Strict inequality
• Equality
• Inequation
• Tilde
• Congruence
• Infinity
• Inequality
• Material equivalence
• Material implication
• Theta
• Empty set
• Triangle or delta
• For all
• Pi constant
• Integral
• Intersection
• Union
• Factorial
• Therefore
• Square root
• Perpendicular
• Exists
• Line
• Line segment
• Ray
• Right angle
• Angle
• Summation
• Braces (grouping)
• Brackets
• Parentheses (grouping)

Mathematics Symbols Chart

### Geometric Lines Names

Here are some basic lines in geometry.

• Straight
• Diagonal
• Vertical
• Parallel lines
• Curved
• Horizontal
• Dotted
• Wavy
• Zigzag

Lines Vocabulary in English | Image

### Hundreds Chart: Numbers 1-100 Counting Chart

Numbers are the words or symbols that we use to count quantity.

The symbols that we use for numbers today (0, 1, 2, 3, 4, 5, 6, 7, 8, 9) are called Arabic numerals.

Learn how to count 1-100 with useful hundreds chart and examples.

### Number Chart: How to Write Numbers in Words

A number is a mathematical object used to count, measure, and label.

Learn this number chart which explains in details how to say and write different numbers in words.

## Math Vocabulary Videos

MATH Symbols: Useful List of Mathematical Symbols in English with American English Pronunciation.

Math Vocabulary: Learn Mathematics Vocabulary Words in English with American English Pronunciation.

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