Mathematics
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OpenStudy (jamesreed30):
Find the area of the circle with the given radius or diameter use pi equals 3.14 diameter equals 10
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OpenStudy (blazeryder):
\[A=\pi \times r ^{2}\] It is very similar to the last question I helped you on
OpenStudy (blazeryder):
We know the diameter is 10. But how do we find the radius? |dw:1475866351048:dw|
OpenStudy (blazeryder):
@Jamesreed30
OpenStudy (jamesreed30):
10 times 2?
OpenStudy (jamesreed30):
10-5
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OpenStudy (blazeryder):
It would be 10 divided by 2. The radius is always 1/2 the diameter.
OpenStudy (jamesreed30):
Okay so that's my answer?
OpenStudy (blazeryder):
How about I help you work through the problem. =)
OpenStudy (jamesreed30):
Sounds good
OpenStudy (blazeryder):
\[A=\pi \times r ^{2}\] We know the radius is 5 so plug 5 in where the r is at.
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OpenStudy (blazeryder):
What do we do from there?
OpenStudy (jamesreed30):
So 5 times 5 = 25 then 25 times 3.14?
OpenStudy (blazeryder):
You got it!
OpenStudy (blazeryder):
SO what would your answer be?
OpenStudy (jamesreed30):
78.5?
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OpenStudy (blazeryder):
Yup! \[78.5 units ^{2}\]
OpenStudy (jamesreed30):
Thank you once again!
OpenStudy (blazeryder):
Do you have any more questions? I can help you out =)
OpenStudy (jamesreed30):
Yes actually. MY next question says find the exact area of a circle having the given circumference eight pi
OpenStudy (jamesreed30):
But it has the PI symbol
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OpenStudy (blazeryder):
Alright, start a new question and I will answer it. =) Please don't forget to medal!
OpenStudy (jamesreed30):
Yes sir you got it!
OpenStudy (blazeryder):
Thanks =)