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def
An orthographic projection (or orthogonal projection) is a two-dimensional drawing used to represent a three dimensional object.


An orthographic view represents the exact shape of an object seen from one side at a time as you look perpendicularly at the object (without showing depth of the object). An object is usually depicted by three orthographic views: top, front, and right side.

blocks

We will be using "stacking and locking blocks" to illustrate the 3-dimensional objects.  These blocks are 1 inch cubes.

In the examples below, the "orthographic projections" shows views of the top, the front, and the right side.
The "3D Stack" shows a possible three-dimensional figure that could be created from the the orthographic projections. The picture shows a photographic view of the solid formed using stacking blocks.


Orthographic Projections
redblockO
redblock3D
redcubepic2

 

Orthographic Projections
yellowblockO

yellowblock3D
yellowcubepic

 

Orthographic Projections
greenblockO

greenblock3D
greencubepic

 

Orthographic Projections
blueblockO

blueblock3D
bluecubepic



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