The first 20 digets after the dot in pi are: 3.14159265358979323846
Pi = 3.1415926535897932384 (to 19 d.p. or 20 s.f.)
C = 2(pi)r C = 2(pi)20 C = 40(pi) C = 125.6 in
Circumference = (pi) x (diameter) Diameter = Circumference/pi 62.8/pi = 19.98986 (rounded) which is awfully close to 20.
17d and 20 height v=pi r r h v=pi 8.5 8.5 20 v=pi 72.25 20 v=1445pi
3.14159265358979323846 are the first 20 digits of pi.
I'm guessing you mean 20 ft. circumference? With a 20' circumference, here's the math. C=20; C(r)=2*[pi]*r; 2*[pi]*r=20; r=10/[pi] A(r)=r2*[pi]; A=(10/[pi])2*[pi]; A= about 31.831 sq. ft.
pi r2h =pi(20)2(26) =pi(400)(26) =(10400)pi =32656
The first 20 digets after the dot in pi are: 3.14159265358979323846
Pi = 3.1415926535897932384 (to 19 d.p. or 20 s.f.)
Circumference of 20 / pi = the diameter = 6.3662 (to nearest 4th decimal)
Pi is approximately equal to (to 20 places after the decimal) 3.14159265358979323846.
C = 2(pi)r C = 2(pi)20 C = 40(pi) C = 125.6 in
Circumference = (pi) x (diameter) Diameter = Circumference/pi 62.8/pi = 19.98986 (rounded) which is awfully close to 20.
C=2*Pi*r = 20*Pi r=10 A=Pi*r2=Pi*102=100*Pi
17d and 20 height v=pi r r h v=pi 8.5 8.5 20 v=pi 72.25 20 v=1445pi
16 20 24 75 PI 3.14738659885161467454555555555555555578347348743746762318976392187632 16 20 24 75 PI 3.14738659885161467454555555555555555578347348743746762318976392187632