Pi (Pye) is the theorem that was first proposed by Pythagoras of ancient Greece to explain the ratio of a circles radius to it's circumference.
The number produced by dividing the radius into the circumference is called Pi in his honour. The number Pi is recursive, that is as far as it has been calculated it can never be resolved into a divisive whole number.Below is an example to the first 100 decimal points.
3.1487939047983275863218793271042710832671092381263910630965237932762916327910697231067231629716023765793160297659721
The question Pi in 10 probably means using Pi to the tenth decimal place which would be 3.1487939047
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Not sure what pi-co is, but if you mean the prefix pico, for SI units, the answer is 10-12.
By Euler's formula, e^ix = cosx + i*sinx Taking natural logarithms, ix = ln(cosx + i*sinx) When x = pi/2, i*pi/2 = ln(i) But ln(i) = log(i)/log(e) where log represents logarithms to base 10. That is, i*pi/2 = log(i)/log(e) And therefore log(i) = i*pi/2*log(e) = i*0.682188 or 0.682*i to three decimal places.
It's pico, and it is 10-12
Slant area = 2*pi*r*l Base area = 2*pi*r2 So total surface area = 2*pi*r*(l+r) = 904.8 sq inches.
The area of the full circle is (pi R2) = (25 pi) square inches. The full circumference is (2 pi R) = (10 pi) inches. An arc length of 10 is [ 10/(10 pi) ] = ( 1 / pi ) of the full circle. So the area of the sector is (full area / pi) = (25 pi) / pi = 25 square inches