
This is a file from the Wikimedia Commons. Information from its description page there is shown below. Commons is a freely licensed media file repository. You can help.

Summary

This vector image was created with MetaPost. For MetaPost source code please see below. 
Generated from the following MetaPost code:
beginfig(1)
pair A[], B[], C[];
A[0]:=(1cm, 1cm); A[1]:=(5cm, 1cm);
A[2]:=(5cm, 5cm); A[3]:=(1cm, 5cm);
A[4]:=(2cm, 2cm); A[5]:=(4cm, 2cm);
A[6]:=(4cm, 4cm); A[7]:=(2cm, 4cm);
for i = 0 upto 7:
draw A[i] withpen pencircle scaled 6pt;
B[i] = A[i] + (6cm, 0cm);
draw B[i] withpen pencircle scaled 6pt;
C[i] = A[i] + (12cm, 0cm);
draw C[i] withpen pencircle scaled 6pt;
endfor;
draw A[0]A[1]A[2]A[3]cycle;
draw A[4]A[5]A[6]A[7]cycle;
draw A[0]A[4]; draw A[1]A[5];
draw A[2]A[6]; draw A[3]A[7];
draw B[0]B[1] dashed evenly;
draw B[1]B[2]B[3]B[0];
draw B[4]B[5]B[6]B[7]cycle;
draw B[0]B[4];
draw B[1]B[5]; draw B[2]B[6];
draw B[3]B[7]; draw B[4]B[6];
draw B[0]B[5];
draw B[1]B[6]; draw B[2]B[7];
draw B[3]B[4];
draw C[1]C[2]C[3];
draw C[4]C[5]C[6]C[7]cycle;
draw C[0]C[4] dashed evenly;
draw C[1]C[5]; draw C[2]C[6];
draw C[3]C[7]; draw C[4]C[6];
draw C[0]C[5] dashed evenly;
draw C[1]C[6]; draw C[2]C[7];
draw C[3]C[4];
endfig;
end;
Licensing
Public domainPublic domainfalsefalse 

I, the copyright holder of this work, release this work into the public domain. This applies worldwide. In some countries this may not be legally possible; if so: I grant anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.Public domainPublic domainfalsefalse

File usage
The following pages on Schools Wikipedia link to this image (list may be incomplete):
This file contains additional information, probably added from the digital camera or scanner used to create or digitize it. If the file has been modified from its original state, some details may not fully reflect the modified file.
Schools Wikipedia was launched to make learning available to everyone. SOS Childrens Villages is there for the children in our care until they are ready for independence. Sponsoring a child is the coolest way to help.