Compute the area of the following triangle. (Express answer in cm²)
b = 20 in.
h = 4 in.
a =_____cm2
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OpenStudy (anonymous):
i got 40 inches
OpenStudy (anonymous):
Correct!!
OpenStudy (anonymous):
convert to cm. Is this where you are stuck?
OpenStudy (anonymous):
area of triangle = half multiplied by base multiplied by height
for your triangle area is = 20 x 4/ 2 = 40 square inches.
and 1 inch = 2.5 cm
1 square inches = 6.25 square cm
OpenStudy (anonymous):
2.54cm = 1in (if you want to be picky)
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OpenStudy (anonymous):
So just multiply 40 with 6.25 to get in square cm
OpenStudy (anonymous):
:P dont wanna be
OpenStudy (anonymous):
so 40x2.54=89.60
OpenStudy (anonymous):
Then I hope the .04^2 that is omitted will not give you the wrong answer.
OpenStudy (anonymous):
no multiply by 2.5 x 2.5 to get square cm
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OpenStudy (anonymous):
that is less than 4% error so its valid
OpenStudy (anonymous):
250
OpenStudy (anonymous):
when doing conversions. write down your units and cancel them out as you go. If your anser doesn't match the required units there has been a mistake. Book keeping is important during conversions. very helpful.... @suvesh253 I hope you are not an engineer. jk