luisz

Linda joined cardboard pieces to make a square pyramid, as shown below. If the dimensions of the pyramid are made four times greater, which statement is true about the surface area of the new pyramid?

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luisz

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A square pyramid is shown with length of the square base sides equal to 9 inches and the altitude of one of the lateral triangular faces as 6 inches.

dpaInc

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waiting for the pic...

luisz

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Anything?

dpaInc

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usually it takes a while like the previous ones.. but still nothing...:(

luisz

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hmm

luisz

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I might have an idea.

luisz

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Volume of a pyramid=1/3bh

luisz

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The base is 9 while the slant height is 6

luisz

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54/3=18

luisz

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If the dimensions were multiplied by 4, then the base would be 36 and the height would be 24

luisz

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36 times 24=864/3=288

luisz

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288/18=16!!!!!!!!!!

luisz

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It will be sixteen times the original pyramid’s surface area.

luisz

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I got this one, sir.