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# Primary Differences Between Prisms and Pyramids

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Know the words to know the content. Geometry is a branch of mathematics that relies heavily on students' understanding of words and their meanings.

Know the words to know the content. Geometry is a branch of mathematics that relies heavily on students' understanding of words and their meanings.

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### Transcript

• 1. Primary Differences between Prisms and Pyramids
Definitions, Examples, and Non-Examples
FLAN 613 – Hannah Higgins
• 2. Definition of Prisms
A prism is a type of polyhedron that has a flat top that matches its bottom part. All other faces are parallelograms.
The specific name for a prism is based on the name of the 2 identical faces.
• 3. Definition of Pyramids
A pyramid is a polyhedron that has a point at the top. The base may be any polygon. All other faces must be triangles.
The specific name of a pyramid is based on the shape of the figure on the bottom of the pyramid.
• 4. Examples of Prisms
Triangular prism
Rectangular prism
Photo Credit: http://www.flickr.com/photos/morethanmaths/4014100537/
• 5. Examples of Pyramids
Actual Pyramid
Mathematical representation of a pyramid
Photo Credit: http://i.images.cdn.fotopedia.com/flickr-2427530661-hd/World_Heritage_Sites/Middle_East/Egypt/Memphis_and_its_Necropolis_-_the_Pyramid_Fields_from_Giza_to_Dahshu/Giza_Necropolis/Pyramid_of_Khafre/Pyramid_of_Khafre-Giza_Necropolis-hd.jpg
• 6. Almost Prisms
Cylinders look like prisms, but they are different. Circles are not considered polygons.
Cylinders have a curved edge connecting the two circles, while prisms have clearly defined edges between rectangular faces.
• 7. Almost Pyramids
Cones look like pyramids, but they are different. The base of a cone is a circle, not a polygon.
Cones and pyramids both have a pointy top, but pyramids have clearly defined edges between triangular faces.
Photo Credits: http://www.flickr.com/photos/like_the_grand_canyon/3743007993/sizes/l/in/photostream/
http://www.freefoto.com/images/21/19/21_19_59---Traffic-Cones_web.jpg
• 8. Comparing and Contrasting Prisms and Pyramids
Both are polyhedrons.
Both must have polygon faces.
Both cannot have circles.