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Earn +20 ptsQ: What was the Chinese estimate of pi?
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What is the Chinese fraction approximation of pi?
pi=355/113 http://www.pidayinternational.org/Pi_History/HISTORY_OF_PI_Ancient_China.htm
What is contribution of aryabhatta in history of pi?
He estimated pi to 5 decimal places. This estimate was mentioned in Al-Khwarizmi's book on algebra and through that route the estimate arrived in Europe.
What is the best estimate of the area of a circle with a diameter of 10 cm?
You have to calculate the radius - half the diameter. Then square the radius, and multiply by pi (approximately 3.1416). If you want to do a mental estimate, round pi to 3.
A right cylinder has a radius of 3 and a height of 12. What is its surface area?
Total surface area is about 282.74 units2 (90 pi)(Using pi = 3.14 gives the estimate 282.6)SA = (pi 2r) x h + 2 (pi r2) = 72 pi + 2 (9 pi) = 90 pi
How could you estimate the area of a circle whose radius is 1 centimeter?
The area is 2*pi*12 = 2*pi. Using pi = 3.14, that would give an estimated area of 3.14 cm2.
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