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bekah2297

  • 2 years ago

A square pyramid has a slant height of 17 inches and a height of 15 inches. What is its surface area if the square base has sides of length 16 inches?

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  1. scarydoor
    • 2 years ago
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    What do you mean by slant height?

  2. bekah2297
    • 2 years ago
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    i have no idea,this is on my geometry homework

  3. bekah2297
    • 2 years ago
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    736 is not an option though...

  4. scarydoor
    • 2 years ago
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    I suggest going through your notes and figuring out what slant height is. Or searching on the internet somewhere. It's been my experience that trying to work out a maths problem when I don't know what the words mean is very hard!

  5. SchoolSlacker
    • 2 years ago
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    Can you give the options?

  6. SchoolSlacker
    • 2 years ago
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    What have you been learning so i know which method we are aiming for

  7. bekah2297
    • 2 years ago
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    224 in2 480 in2 800 in2 864 in2

  8. bekah2297
    • 2 years ago
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    this is lateral and surface area.

  9. SchoolSlacker
    • 2 years ago
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    The formula you are looking for is 2bs+b^2

  10. SchoolSlacker
    • 2 years ago
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    2x16x17+16x16

  11. SchoolSlacker
    • 2 years ago
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    =800

  12. SchoolSlacker
    • 2 years ago
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    b=base s=slant

  13. phi
    • 2 years ago
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    Here is the formula http://en.wikipedia.org/wiki/Pyramid_(geometry)#Surface_area

  14. bekah2297
    • 2 years ago
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    Thank you guys.

  15. SchoolSlacker
    • 2 years ago
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    Phi that is a complex formula :P

  16. phi
    • 2 years ago
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    Find the area of the base (the bottom) which is a square 16*16 find the area of the sides. this is Perimeter of the base/2 times slant height Perimeter is 4 times the base side= 4*16= 64 64/2= 32 so 32*17 for the sides

  17. phi
    • 2 years ago
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    Take these things a little bit at a time.

  18. SchoolSlacker
    • 2 years ago
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    You must live a complicated life Phi :P

  19. phi
    • 2 years ago
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    No. Just take small steps. Can you find the area of the base (you know it is a square) with a side= 16

  20. phi
    • 2 years ago
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    Can you find the perimeter of the base? 4* side = 4*16

  21. SchoolSlacker
    • 2 years ago
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    Phi who you teaching?

  22. phi
    • 2 years ago
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    The formula says Perimeter/2 so 64/2 = 32 *who ever is curious

  23. SchoolSlacker
    • 2 years ago
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    That must be i then, continue please :P

  24. phi
    • 2 years ago
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    Area = Base area + P*S/2 where we already figured out Base area= 256 P is perimeter , we got 4*16= 64 P/2 =32 S is given as 17 so Area = 256 + 32*17 = 800

  25. phi
    • 2 years ago
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    It is no harder than following a recipe to cook a meal (actually easier, because you can't hurt yourself when dicing up the food)

  26. SchoolSlacker
    • 2 years ago
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    A question to your Highness, Isn't my formula less time consuming

  27. phi
    • 2 years ago
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    It looks fine. The important thing is (1) remember it (2) be able to use it.

  28. SchoolSlacker
    • 2 years ago
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    AyeAye Capt'n, Interesting techniques yours. Reminds me of someone cant remember who ::P

  29. SchoolSlacker
    • 2 years ago
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    Thanks for the intriguing method, it is easier to understand if your not into geometry

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