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Glossary

         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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