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Mission 2

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  1. Mission 2 Mission for 2: To successfully find the total area of pyramids and cones. Vocabulary: total (surface) area, lateral area, slant height (s) Formulas: L.A. = T.A. = L.A. + Abase

  2. Formula for L.A. The formula for the lateral area (L.A.) of a regular pyramid or cone is the half product of its slant height s and the perimeter p of its base. L.A. =

  3. Formula for S.A. The formula for the surface area (S.A.) of a regular pyramid or cone is the sum of its lateral area and the area of its base (A). T.A.= L.A.+ Abase

  4. Let’s Try one Find the surface area of a cone with a radius of 10 and a slant height of 13. Click on “Freckle Boy” after you’ve finished the problem.

  5. Here is your Answer... T.A. = L.A. + Abase = +  r2 = +  r2 = + (10)2 = 408.41 + 314.16 = 722.57 units2

  6. Here is another one! Find the lateral area of a square pyramid with a slant height of 14 and a base edge of 25.

  7. The answer you have selected is incorrect. The correct answer was 700. Don’t worry. . . The little guy has the answer!

  8. Here is your Answer... LA = = = 700 units2

  9. Pretty slick rick. Keep on truckin’

  10. Now let’s pump up the VOLUME!

  11. Click on Box Muddler if you love Geometry!

  12. Exit! I hope you’ve enjoyed the show.