From 1991 to 2004, the residents of Memphis, Tennessee, had the unique opportunity to experience various sporting and concert venues from inside the Pyramid Arena. For a time, the University of Memphis men's basketball program as well as the National Basketball Association team, the Memphis Grizzlies, called this pyramid home.

The Pyramid Arena is a prime example of modern architecture in the form of a right regular pyramid. Look at the two pyramids below. One pyramid is termed a right rectangular pyramid, while the other is termed an oblique rectangular pyramid.

Pyramid A |
Pyramid B |

Which pyramid do you think is the right rectangular pyramid? Why?

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Pyramid A is a right rectangular pyramid. It has a rectangular base and all of the triangles come to a common vertex, or apex, that is located directly above the center of the base. Because of this, the opposite faces will be congruent.Which is the oblique rectangular pyramid? Why?

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Any pyramid with triangular, lateral faces that do not meet at a common vertex, or apex, above the center of the base is considered to be oblique. Because of this, it is possible that the triangular, lateral faces will not be congruent.The Pyramid Arena in Memphis is referred to as a "regular" pyramid. What makes any solid regular?

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A solid is considered regular when its base is a regular polygon.