Mathematics
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OpenStudy (anonymous):
Medal question
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OpenStudy (anonymous):
OpenStudy (anonymous):
@BlankĀ
OpenStudy (anonymous):
Oops not that one!!
OpenStudy (anonymous):
ganeshie8 (ganeshie8):
Lateral Area = \(\large \text{(Perimeter of base) x (Height)}\)
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OpenStudy (anonymous):
15?
ganeshie8 (ganeshie8):
find/figure out the value of perimeter and height,
then plugin
ganeshie8 (ganeshie8):
good try, but no
ganeshie8 (ganeshie8):
think of the given shape as a BOX
ganeshie8 (ganeshie8):
base will be the bottom surface of the box, which is just a rectangle of length = 5, width = 12
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ganeshie8 (ganeshie8):
Whats the perimeter of rectangle of length = 5, width = 12 ?
OpenStudy (anonymous):
60?
ganeshie8 (ganeshie8):
nope, that wud be area, not perimeter
OpenStudy (anonymous):
Do I need to do l x w? Which I did.
5 x 3 = 15
5 x 7 = 35
3 x 7 = 21
= 71
OpenStudy (anonymous):
Then 71 x 2 = 142
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ganeshie8 (ganeshie8):
yes ! and take twice of that cuz u have two sides for each :
front = back
left = right
top = bottom
OpenStudy (anonymous):
It would be 142
OpenStudy (anonymous):
?
ganeshie8 (ganeshie8):
Yep, thats the total surface area
OpenStudy (anonymous):
Okay, I have one more then that's it.
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OpenStudy (anonymous):
ganeshie8 (ganeshie8):
start by finding the perimeter of triangular base
ganeshie8 (ganeshie8):
Look at the given diagram -
what are the lengths of sides of base triangle ?
OpenStudy (anonymous):
2b+ph is the formula?
ganeshie8 (ganeshie8):
thats the formula for Total surface area,
but the question is asking u to just calculate the Lateral area
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ganeshie8 (ganeshie8):
Lateral area = ph
ganeshie8 (ganeshie8):
p = perimeter of base
OpenStudy (anonymous):
All I have to do is add them all together?
ganeshie8 (ganeshie8):
yes
perimeter of base triangle = 3 + 4 + 5 = 12
ganeshie8 (ganeshie8):
height = 2
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ganeshie8 (ganeshie8):
Lateral area = ph = 12*2 = 24
OpenStudy (anonymous):
Oh okay, I get it now.
OpenStudy (anonymous):
Thank you again!