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12.3 Surface Area of Pyramids and Cones

12.3 Surface Area of Pyramids and Cones. State Standards. Lesson Goals. Find the surface area of a pyramid. 8 , 9: Solve problems involving the surface area lateral area of geometric solids and COMMIT TO MEMORY THE NECESSARY FORMULAS. definitions. Pyramid Base : a polygon

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12.3 Surface Area of Pyramids and Cones

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  1. 12.3 Surface Area of Pyramids and Cones State Standards Lesson Goals Find the surface area of a pyramid 8, 9: Solve problems involving the surface area lateral area of geometric solids and COMMIT TO MEMORY THE NECESSARY FORMULAS.

  2. definitions • Pyramid • Base: a polygon • Lateral faces: triangles around the perimeter of the base with a common vertex. • Altitude: the perpendicular distance between the base and the vertex. • A pyramid is named for its base. Hexagonal Pyramid Rectangular Pyramid

  3. altitude taking the elevator taking the stairs slant height face lateral definitions • Pyramid • Regular: the base is a regular polygon • Slant height: the altitude of any lateral face. • A non-regular pyramid does not have a defined slant height.

  4. Surface Area (pyramid)

  5. Find the area of a lateral face and the surface area. Round the result to one decimal place.

  6. Find the surface area. Round the result to one decimal place. 4

  7. Find the area of a lateral face and the surface area. Round the result to one decimal place.

  8. Find the missing measurements of the regular right pyramid.

  9. example Find the surface area. 9 ft 4 ft

  10. You try

  11. Today’s Assignment • p. 738: 3 – 7, 14 – 19, 26, 35, 38

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