Pyramid



                                                                                 




3 dimensional triangle

http://www.mathsisfun.com/definitions/pyramid.html

http://mathcentral.uregina.ca/QQ/database/QQ.09.08/h/craig2.html


http://www.mathsisfun.com/geometry/pyramids.html   



http://en.wikipedia.org/wiki/Pyramid_(geometry)


http://en.wikipedia.org/wiki/Pyramid


http://www.cliffsnotes.com/study_guide/Regular-Pyramids.topic

http://www.icoachmath.com/SiteMap/Pyramid.html

http://www.math.com/school/subject3/lessons/S3U4L3GL.html#sm1

http://www.math.washington.edu/~greenber/PyrDrawings.html



http://www.amblesideprimary.com/ambleweb/mentalmaths/pyramid.html