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Pyramids and prisms are specific kinds of polyhedra.
The word polyhedra is the plural form of polyhedron.
If you know the common polygons and if you know the
difference between a prism and a pyramid, naming these shapes is
easy.
• A sphere is the set of all points in space that are the same distance from a point, the center of the sphere.
• A hemisphere is created when a sphere is cut in half.
Find the Surface Area of a Sphere• Find the surface area of the sphere. Round your
answer to the nearest whole number.
a.
The radius is 8 in.
24S r24 (8)
8 in. 2804644 in
Find the Surface Area of a Sphere• Find the surface area of the sphere. Round your
answer to the nearest whole number.
b.
The radius is 5 cm.
24S r24 (5)
10 cm.2314254 cm
Find the Volume of a Sphere• Find the volume of the sphere. Round your answer to the
nearest whole number.
a.
32(3.14)
3
34
3V r
34(2)
3
4(8)
3
32
3
334 .ft
2 ft.
Find the Volume of a Sphere• Find the volume of the hemisphere. Round your answer to
the nearest whole number.
b. A hemisphere has half the volumeof a sphere.
31 4
2 3V r
31 4
(5)2 3
250
3
3262 .in
a 5 in.
Find the Volume of a Sphere• Find the volume of the sphere. Round your answer to the
nearest whole number.
a.34
3V r
34(6)
3
4(216)
3
2883905 .in
6 in.