with the radius of 10
2007-07-14 05:28:45 · 10 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
C = 2pi*r = 20pi
A = pi* r^2 = 100pi
2007-07-14 05:32:01 · answer #1 · answered by Steve A 7 · 0⤊ 0⤋
so circumfence is defined as 2*pi*r with r the radius of the circle so the circumference is 20*pi
area is p*r^2 so the area is 100*pi
2007-07-14 05:40:20 · answer #2 · answered by careyschwartz 2 · 0⤊ 0⤋
Circumference = pi * diameter so 20*pi
Area = pi * radius^2 so 100*pi
2007-07-14 05:33:19 · answer #3 · answered by Andrew 4 · 0⤊ 0⤋
Circumference= 2*pi*r
= 2*3.14*10
= 62.8
Area= pi*r*r
= 3.14*10*10
= 314
2007-07-14 06:04:33 · answer #4 · answered by chris 3 · 0⤊ 0⤋
circumference=2 X22/7 X 10 = 62.84 cm( I assumed cm unit)
Area = 22/7 X 10 X 10 = 314.2 sq cm
2007-07-14 05:42:49 · answer #5 · answered by bihariraja 3 · 0⤊ 0⤋
circumference is PI*diameter
diameter is 2*radius so
circumference is 2*PI*radius
area is PI*radius ^2 so 100*PI
this is pretty basic stuff... study!
2007-07-14 05:34:46 · answer #6 · answered by Anonymous · 0⤊ 0⤋
C = 2*pi*R
= 2*pi*10
= 20*pi
Area = pi*R^2
= pi*10^2
= 100*pi
2007-07-14 05:32:51 · answer #7 · answered by ? 6 · 0⤊ 0⤋
Circum of a circle=2Pi.r
=2(3.14)10
=62.8
Areaof a circle=Pi.r^2
=3.14.10.10
=314 sq units
2007-07-14 08:03:37 · answer #8 · answered by MAHAANIM07 4 · 0⤊ 0⤋
C = 2 x π x 10
C = 62.8 units (to 1 dec. place)
Area = π r²
Area = π x 100
Area = 314 units²
2007-07-14 06:30:57 · answer #9 · answered by Como 7 · 0⤊ 0⤋
C = pi x d
A = pi x r x r
x= times, multiply
2007-07-14 05:33:49 · answer #10 · answered by <3 3 · 0⤊ 0⤋