Math Ms.Sue???

Find the surface area of the cone. Use 3.14 for pi. The diameter is 8in and the height is 7in please help asap!! And thank you for your time. Ms.Sue?

asked by Ellie_Fan
  1. http://www.mathopenref.com/conearea.html

    posted by Ms. Sue
  2. You will need the slant height s , the hypotenuse
    s^2 = 4^2 + 6^2 = √52

    surface area = πrs + (πr^2) , using the formula on Ms Sue's page
    = 4√52π + 16π

    You didn't state if the circular base is to be included, so ....
    your choice.

    posted by Reiny
  3. 649.98 square feet

    posted by Jordan

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