** Term: Line**

* **Informal Definition:*

A one-dimensional object that goes on infinitely in either direction

This definition was created from my own experiences.

*Formal Definition:*

A line is a straight one-dimensional figure having no thickness

and extending infinitely in both directions

This definition came from Wolfram Math World.

*Example of line:*

Image taken from: http://mathworld.wolfram.com/Line.html

*Term: Angle*

* **Informal Definition;*

The area between two lines that intersect

This definition was created from my own experiences.

*Formal Definition:*

A shape, formed by two lines or rays diverging from a common

vertex.

This definition was taken from Math Open Reference.

*Example:*

Image taken from: http://mathworld.wolfram.com/Line.html

*Term: Shape:*

* **Informal Definition*

An enclosed space

This definition was taken from one of my fifth grade students.

*Formal Definition:*

The quality of a distinct object or body in having an external surface

or outline of specific form or figure

This definition was acquired from the online dictionary.

* **Example:*

Image taken from: http://www.tsooj.net/examples/imagemapper

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