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Mathematics 8 Online
OpenStudy (anonymous):

find the surface area of the pyramid shown to the nearest whole number.

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.

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 = ?

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

OpenStudy (anonymous):

649.8 :D

ganeshie8 (ganeshie8):

round to whole number, its 650

OpenStudy (anonymous):

okai:DD

ganeshie8 (ganeshie8):

good work !

OpenStudy (anonymous):

thanks(:

ganeshie8 (ganeshie8):

np :)

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