Mathematics
10 Online
OpenStudy (here_to_help15):
Help does this look correct?
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OpenStudy (here_to_help15):
@amistre64 is this correct?
OpenStudy (amistre64):
whats the area of the whole circle it is a part of?
OpenStudy (here_to_help15):
I dont know someone really didnt explain it to me
OpenStudy (amistre64):
you dont know how to find the area of a circle?
OpenStudy (here_to_help15):
They just blurted it and i dont believe there correct
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OpenStudy (here_to_help15):
Oh yes! i do lol
OpenStudy (amistre64):
we have 168 out of 360 of a circle to deal with .. so thats the proportion of area as well
168/360 * pi r^2
OpenStudy (here_to_help15):
\[\pi r ^{2}\]
OpenStudy (amistre64):
64pi is the total, we want 168/360 th of it
OpenStudy (here_to_help15):
th?
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OpenStudy (amistre64):
th .. th .. thhhh .. 1/4th 1/5th 1/8th .. th
OpenStudy (here_to_help15):
oh lol
OpenStudy (here_to_help15):
So how would i do that
OpenStudy (amistre64):
what is 168/360 * pi r^2 ?
OpenStudy (here_to_help15):
Im sorry @amistre64 but i dont know
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OpenStudy (amistre64):
what is 168/360? i cant do the math for you ...
OpenStudy (here_to_help15):
as a decimal
OpenStudy (amistre64):
sure
OpenStudy (here_to_help15):
Ok one sec
OpenStudy (here_to_help15):
0.47
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OpenStudy (amistre64):
more decies .46667 now multiply by pi
OpenStudy (here_to_help15):
1.47?
OpenStudy (here_to_help15):
1.46607657168
OpenStudy (amistre64):
1.466 yeah, now multiply by r and then by r agian
OpenStudy (here_to_help15):
which is 8 correct?
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OpenStudy (amistre64):
r=8 yes
OpenStudy (here_to_help15):
So it is A! :)
OpenStudy (amistre64):
yes
OpenStudy (here_to_help15):
OpenStudy (here_to_help15):
Couple more please?
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OpenStudy (amistre64):
if 12am, im heading to bed so just this last one
what is lateral area?
OpenStudy (here_to_help15):
I dont know sorry
OpenStudy (amistre64):
its your vocabulary, not mine
OpenStudy (here_to_help15):
lol
OpenStudy (amistre64):
prisms consist of 2 basic parts ... bases and sides
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OpenStudy (here_to_help15):
Ok
OpenStudy (amistre64):
lateral means side
OpenStudy (amistre64):
if we "unwrap" the sides, we have a rectangle. its width is the perimeter of the base, and its height is .... its heaigh
OpenStudy (here_to_help15):
ok
OpenStudy (amistre64):
surface area is lateral + bases
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OpenStudy (here_to_help15):
Oh ok
OpenStudy (amistre64):
im out ... goodluck