After reading a book about ancient Egypt, Cassie decided to build a model of a pyramid out of cardboard.

How much cardboard does Cassie need to make the model, including the bottom?

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# After reading a book about ancient Egypt, Cassie decided to build a model of a pyramid out of cardboard.
How much

After reading a book about ancient Egypt, Cassie decided to build a model of a pyramid out of cardboard.

How much cardboard does Cassie need to make the model, including the bottom?