Learn punctuation marks, keyboard and math symbols in English. Punctuation marks are symbols used in written language to indicate the structure and organization of sentences.

## Punctuation Marks, Keyboard and Math Symbols

### Punctuation Marks

**.**period (US) or full stop (UK)**,**comma**!**exclamation mark**?**question mark**:**colon**;**semicolon**“ ”**quotation marks**‘ ’**single quotes**( )**parentheses**{ }**curved brackets**[ ]**square brackets**@**“at” sign or symbol*****asterisk**~**tilde**/**slash**–**dash**#**pound sign**$**dollar sign**&**and or ampersand

### Math Symbols

- Plus (
**+**) - Minus (
**–**) - Multiplication (
**x**or*****) - Division (
**÷**or**/**) - Equal (
**=**) - Not equal (
**!**= or**<>**) - Greater than (
**>**) - Less than (
**<**) - Greater than or equal to (
**>=**) - Less than or equal to (
**<=**) - Square root (
**√**) - Cube root (
**3√**or**∛**) - Percent (
**%**) - Permille (
**‰**) - Infinity (
**∞**) - Pi (
**π**) - Exponent (
**^**or******) - Modulo (
**mod**or**%**) - Factorial (!)
- Integral (
**∫**) - Derivative (
**d/dx**or**∂/∂x**) - Summation (
**Σ**) - Product (
**Π**) - Limit (
**lim**) - Absolute value (
**| |**) - Parentheses
**()** - Brackets
**[]** - Braces
**{}** - Union (
**∪**) - Intersection (
**∩**) - Dot product (
**·**) - Cross product (
**×**) - Angle (
**∠**) - Degree (
**°**) - Radian (
**rad**) - Logarithm (
**log**or**ln**) - Natural logarithm (
**ln**) - Sine (
**sin**) - Cosine (
**cos**) - Tangent (
**tan**) - Secant (
**sec**) - Cosecant (
**csc**) - Cotangent (
**cot**) - Arc sine (
**arcsin**or**sin^-1**) - Arc cosine (
**arccos**or**cos^-1**) - Arc tangent (
**arctan**or**tan^-1**) - Hyperbolic sine (
**sinh**) - Hyperbolic cosine (
**cosh**) - Hyperbolic tangent (
**tanh**) - Inverse (
**^-1**)

#### Angles Vocabulary

Angle is a measure of the amount of rotation between two lines or planes.

**Vertex**: The point where two lines or rays of an angle meet.**Ray**: One of the two lines or segments that form an angle.**Acute angle**: An angle that measures less than 90 degrees.**Right angle**: An angle that measures exactly 90 degrees.**Obtuse angle**: An angle that measures more than 90 degrees but less than 180 degrees.**Straight angle**: An angle that measures exactly 180 degrees.**Reflex angle**: An angle that measures more than 180 degrees but less than 360 degrees.**Complementary angles**: Two angles whose sum is 90 degrees.**Supplementary angles**: Two angles whose sum is 180 degrees.**Adjacent angles**: Two angles that share a common vertex and a common side but do not overlap.**Linear pair**: A pair of adjacent angles whose non-common sides are opposite rays.**Conjugate angles**: Two angles that share the same initial and terminal sides but face in opposite directions.**Central angle**: An angle that has its vertex at the center of a circle.**Inscribed angle**: An angle formed by two chords of a circle that share an endpoint on the circle.**Interior angle**: An angle that is inside a shape or figure.**Exterior angle**: An angle that is outside a shape or figure.**Transversal**: A line that intersects two or more lines at different points.**Alternate interior angles**: Two angles formed by a transversal and two intersecting lines that are on the opposite side of the transversal.**Alternate exterior angles**: Two angles formed by a transversal and two intersecting lines that are on the same side of the transversal.**Corresponding angles**: Two angles formed by a transversal and two intersecting lines that are in corresponding positions.**Vertical angles**: Two angles formed by two intersecting lines that are opposite each other and are always congruent.

#### Line Vocabulary

A **line** is a geometric object that extends infinitely in both directions.

**Ray**: A line that has one endpoint and extends infinitely in one direction.**Line segment**: A line that has two endpoints and is of finite length.**Intersecting lines**: Two or more lines that cross each other at a single point.**Parallel lines**: Two or more lines that never intersect and are always the same distance apart.**Perpendicular lines**: Two lines that intersect at a right angle.**Transversal**: A line that intersects two or more lines at different points.**Angle**: The measure of the amount of rotation between two lines or planes.**Point**: A location in space that has no size or dimension.**Slope**: The rate at which a line rises or falls.**Y-intercept**: The point at which a line crosses the y-axis.**X-intercept**: The point at which a line crosses the x-axis.**Linear equation**: An equation in which the highest power of the variable is 1.**Linear function**: A function that can be represented by a linear equation.**Distance**: The length of the shortest path between two points.**Midpoint**: The point that is halfway between two given points.**Endpoint**: The point at which a line segment or ray begins or ends.**Collinear points**: Three or more points that lie on the same line.**Congruent lines**: Two or more lines that have the same length.**Bisector**: A line, plane or point that cuts another line segment into two congruent segments.**Line of symmetry**: A line that divides a shape into two congruent parts, or mirror images of each other.

## Punctuation Marks, Keyboard and Math Symbols | Image

*Punctuation Marks*

*Math Symbols*

Excelent material

Excelent material

send me data

Excelent

Yes, content.

Welcome me

when I try to describe computer language , it helps to know the correct names , a horizontal squiggle is a tilde