Practice and Problem-Solving Exercises

A Practice

See Problem 1.

Find the surface area of each pyramid to the nearest whole number.

See Problem 2.

Find the lateral area of each pyramid to the nearest whole number.

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15. Social Studies The original height of the Pyramid of Khafre, located next to the Great Pyramid in Egypt, was about 471 ft. Each side of its square base was about 708 ft. What is the lateral area, to the nearest square foot, of a pyramid with those dimensions?

See Problems 3 and 4.

Find the lateral area of each cone to the nearest whole number.

Find the surface area of each cone in terms of π . pi .

B Apply

22. Reasoning Suppose you could climb to the top of the Great Pyramid. Which route would be shorter, a route along a lateral edge or a route along the slant height of a side? Which of these routes is steeper? Explain your answers.
23. The lateral area of a cone is 4.8 π   in . 2 . 4.8 pi . in , . squared , . The radius is 1.2 in. Find the slant height.

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