4 * 3.141592653589793 = 12.56637
pi was found when they realized that the radius of any circle is the amount of the perimeter multiplied by pi aka 3.14 and so on.
The diameter multiplied by (pi)2 . That's about 9.87 times the diameter.
Formula for finding the circumference of a circle: 2 multiplied by pi multiplied by radius
pi multiplied by the radius squared
For what it is worth, the answer is 4.818029 (to 6 dp)
'e' is an imaginary number, multiplied by anything gives an imaginary result
Because the circumference is equal to the diameter multiplied by pi or the radius multiplied by 2*pi.
1/3 multiplied by pi multiplied by radius squared multiplied by height
The answer is 12.56
449184.53
24.492, unless you want more digits of pi besides the standard 3.14. The circumference of a circle is equal to the diameter multiplied by pi, or the radius multiplied by two, then multiplied by pi. c = d*pi c = 2*r*pi c = circumference d = diameter r = radius pi = 3.141593
pi multiplied by r squared multiplied by height
60 cm x pi = 188,5 cm
Do you mean volume or surface area? volume = 4/3 x pi x r^3 (four divided by three, multiplied by pi, multiplied by radius cubed). surface area = 4 x pi x r^2 (four multiplied by pi, multiplied by radius squared).
25.12 dah
Pi multiplied by the Diameter.