Pronunciation: /ˌpɛn.təˈhi.drən/ Explain
Click on the blue points and drag them to change the figure. Click on a blank area of the screen and drag to rotate the figure.|
|Manipulative 1 - Pyramidal Pentahedron Created with GeoGebra.|
Click on the blue points and drag them to change the figure.|
Can you think of any other pentahedron?
|Manipulative 2 - Triangular Prism Created with GeoGebra.||
A pentahedron is a five sided
There is no regular pentahedron. There are two pentahedrons that can exist in
One is a square pyramid (see manipulative 1).
A geometric net
is a shape that can exist in 2-space, which can be folded
into a polyhedron. Click on the name of the net to download a printable net you can
cut out and decorate.
A triangular prism has identical triangles as base and top
with straight sides.
A square pyramid has a square bases with straight sides
that come to a point.
Irregular Pentahedron Net
Manipulative 3 is an irregular pentahedron net you can change, print out, and put
together. Click on the blue points to change the net. If any part of the net
disappears or any of the lines cross, you have created a net that can not be
Click on the blue points and drag them to change the figure. Print the figure out and tape it together to make an irregular pentahedron.|
Why do three of the points around the edge of the figure have movable points and the fourth does not?
|Manipulative 3 - Net of an Irregular Pentahedron Created with GeoGebra.|
- McAdams, David E.. All Math Words Dictionary, pentahedron. 2nd Classroom edition 20150108-4799968. pg 136. Life is a Story Problem LLC. January 8, 2015. Buy the book
- McAdams, David E.. Polyhedron. allmathwords.org. All Math Words Encyclopedia. Life is a Story Problem LLC. 3/12/2009. http://www.allmathwords.org/en/p/polyhedron.html.
- Euclid of Alexandria. Elements. Clark University. 9/6/2018. https://mathcs.clarku.edu/~djoyce/elements/elements.html.
Cite this article as:
McAdams, David E. Pentahedron. 3/26/2019. All Math Words Encyclopedia. Life is a Story Problem LLC. http://www.allmathwords.org/en/p/pentahedron.html.
12/21/2018: Reviewed and corrected IPA pronunication. (McAdams, David E.)
12/1/2018: Removed broken links, updated license, implemented new markup, updated geogebra app. (McAdams, David E.)
8/7/2018: Changed vocabulary links to WORDLINK format. (McAdams, David E.)
9/25/2008: Initial version. (McAdams, David E.)