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Chapter 10: Area & Volume 10.4, 10.5, 10.6 Space Figures Surface Area of Prisms, Cylinders, Pyramids, Cones, and Spheres
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Space Figures common three-dimensional figures prisms:two parallel bases that are congruent polygons, lateral faces that are parallelograms
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Space Figures Pyramids:base that is a polygon, lateral faces are triangles Cylinders:two parallel bases that are congruent circles
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Space Figures Cones:one circular base and one vertex Sphere: set of all points in space that are a given distance from a given point called the center
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Example 1 For each figure, describe the bases and name the figure.
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Example 2 Name the space figure you can form from each net:
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Example 2a Name the space figure you can form from each net:
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Surface Area abbreviated S.A. sum of the areas of the base(s) and the lateral faces of a space figure one way to find it: find the area of each piece of the space figure’s net
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Example 1 Find the surface area of the rectangular prism using a net.
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Example 1a Find the surface area of the triangular prism:
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Example 2 Find the surface area of the triangular prism at the right.
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Surface Area of a Prism lateral area:LA = ph –perimeter of base times height surface area:SA = LA + 2B –lateral area plus the area of the two bases
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Surface Area of a Cylinder lateral area:LA = 2πrh –twice pi times the radius of the base times the height surface area:SA = LA + 2B
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Example 3 Find the surface area of the can:
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Example 3a Find the surface area of a can with radius 5 cm and height 20 cm.
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Surface Area of a Pyramid lateral area:LA = ½ pl –½ perimeter of the base times the slant height surface area:SA = LA + B –lateral area plus the area of the base
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Example 1 Find the surface area of the square pyramid:
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Surface Area of a Cone lateral area:LA = πrl –pi times radius times slant height surface area:SA = LA + B –lateral area plus area of the base
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Example 2 Find the surface area of the cone:
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Surface Area of a Sphere
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Example 3 Calculate the surface area of a basketball:
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Homework p. 541:2-12 even, 21-23 p. 548:4-12 all p. 555:1-12 all
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