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A right square pyramid has a volume of 48 cm3 and a height of 4 cm. What is the slant height?
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briannamilcic:
it would be 7,680 for the slant height
briannamilcic:
how though you can dm if you want
reds:
that's too high to be the slant height how did you get that..?
reds:
that's too high to be the slant height how did you get that..?
briannamilcic:
my dad told me
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jhonyy9:
|dw:1621363779380:dw|
given that is a square pyramid what mean that the base is a square
volume V = area of base B time height h divide 3
48 = B × h /3
B = side × side
h = 3
48 = B × 3/3
48 = B ×1
B = 48
(side)^2 = 48
side = sqrt48
side = sqrt(16*3)
side = 4sqrt3
side/2 = 4sqrt3 /2
side/2 = 2sqrt3
jhonyy9:
from triangle VOF with VO = 3 ,OF = 2sqrt3 using Pythagora's theorem you can calcule easy the length of slant height
jhonyy9:
sorry i made a mistaque height length is 4 not 3
@jhonyy9 wrote:
Created with Raphaëlslant heighthABCDOVFReply Using Drawing
given that is a square pyramid what mean that the base is a square
volume V = area of base B time height h divide 3
48 = B × h /3
B = side × side
h = 4
48 = B × 4/3
48 ×3 = B ×4
B = 12 ×3 = 36
(side)^2 = 36
side = sqrt36
side = 6
side/2 = 6 /2 = 3
side/2 = 3
jhonyy9:
@jhonyy9 wrote:
from triangle VOF with VO = 3 ,OF = 2sqrt3 using Pythagora's theorem you can calcule easy the length of slant height
so in this way VO = 4 ,OF = 3 and now using these values you can calcule the length of slant height with Pythagora's theorem