# Math Vocabulary Words

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 Words**

Math, short for mathematics, is a subject that involves the study of numbers, shapes, and patterns. It helps us understand and describe the world around us using numbers and symbols. Math is used in many everyday activities, such as counting money, measuring ingredients for a recipe, or telling time.

### List of Mathematics Vocabulary Words

- Straight line
- Perpendicular
- Curve
- Arc
- Circle
- Radius
- 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.

**Radius**

- 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.

*Addition**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)*

### Geometric Lines Names

Here are some basic **lines** in geometry.

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

### 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 Video

#### More interesting articles

- Cardinal Numbers | Cardinal Numbers vs. Ordinal Numbers
- Geometric Lines Names in English with Pictures
- Hundreds Chart: Numbers 1-100 Counting Chart in English
- Mathematical Symbols: Useful List of Math Symbols in English
- Number Chart: How to Write Numbers in Words in English
- Ordinal Numbers | List of Ordinal Numbers | Ordinal Numbers Chart
- Units of Measurement: Length, Weight, Capacity (Volume) and Time