Surface area of pyramids from a net
Add the area of the base to the area of each triangle. A triangle's area is one half of its base times its height.
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A net for a square pyramid has a square base with sides 3 in. Each of its four triangles has base 3 in and height 4 in. What is the surface area of the pyramid in square inches?
Answer: 33
A net for a square pyramid has a square base with sides 5 in. Each of its four triangles has base 5 in and height 8 in. What is the surface area of the pyramid in square inches?
Answer: 105
A net for a square pyramid has a square base with sides 6 ft. Each of its four triangles has base 6 ft and height 3 ft. What is the surface area of the pyramid in square feet?
Answer: 72
Tip: Add the area of the base to the area of each triangle. A triangle's area is one half of its base times its height.
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