Mathematics
8 Online
OpenStudy (anonymous):
find the surface area of the pyramid shown to the nearest whole number.
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OpenStudy (anonymous):
OpenStudy (anonymous):
1,300 m2
390 m2
650 m2
628 m2
OpenStudy (anonymous):
You are the third person to ask me about this question hahaa.
OpenStudy (anonymous):
really???? im sorry i didnt know lol
OpenStudy (anonymous):
Hahaa it's fine.
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OpenStudy (anonymous):
well whats the answer? and ill brb
OpenStudy (anonymous):
I want to say 628 or 650. I don't remember.
OpenStudy (anonymous):
@ganeshie8
ganeshie8 (ganeshie8):
surface area = lateral area + base area
ganeshie8 (ganeshie8):
lateral area = perimeter of base * slant height /2
= ?
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OpenStudy (anonymous):
60*13/2?
ganeshie8 (ganeshie8):
perfect ! thats the lateral area. now find the base area
ganeshie8 (ganeshie8):
base area = perimeter of base * apothem /2
= 60 * 5sqrt(3) / 2
= ?
OpenStudy (anonymous):
i got 259.8
ganeshie8 (ganeshie8):
correct ! add both lateral area and base area. that gives total surface area
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OpenStudy (anonymous):
649.8 :D
ganeshie8 (ganeshie8):
round to whole number, its 650
OpenStudy (anonymous):
okai:DD
ganeshie8 (ganeshie8):
good work !
OpenStudy (anonymous):
thanks(:
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ganeshie8 (ganeshie8):
np :)