2007-05-20 08:51:15 · 11 answers · asked by yvonne W 1 in Science & Mathematics ➔ Mathematics
A = pi * r^2
r = 3 inches
A = 9*pi
2007-05-20 08:53:47 · answer #1 · answered by anonymous_20003 3 · 0⤊ 0⤋
Here's the simple answer:
You need the radius to find the area, since the formula is pi multiplied by the square of the radius.
If the diameter is 6 inches, the radius is half, i.e, 3 inches.
Square it: 3x3 = 9
Multiply that by pi. I stop here. There's a limit to spoon-feeding.
2007-05-20 09:07:21 · answer #2 · answered by rhapword 6 · 0⤊ 0⤋
area is pi*(r squared). Because the diameter is 6, the radius is 3 (1/2 f diameter) so, pi* (3 squared) is 9pi
2007-05-20 08:57:44 · answer #3 · answered by spartan_1117 3 · 0⤊ 0⤋
Formula is: Area= Pi x R^2
SInce Diameter is: 2 x R
Then: R = D/2
So formula is: Area = Pi x D^2/4
3.14 x 36/4
= 3.14 x 9inches
=28.26 square inches
2007-05-20 08:56:47 · answer #4 · answered by ignoramus 7 · 0⤊ 0⤋
a thank you to stipulate the component to a circle: the component to a circle could be got here upon by utilising multiplying pi ( ? = 3.14) by utilising the sq. of the radius If a circle has a radius of four, its section is 3.14*4*4=50.24 in case you recognize the diameter, the radius is a million/2 as super.
2016-11-25 19:20:01 · answer #5 · answered by ? 4 · 0⤊ 0⤋
area of a circle= pi times the radius squared
= pi times 9
= 28.26
2007-05-20 08:54:27 · answer #6 · answered by Anonymous · 0⤊ 0⤋
The formula is pi x r squared
where r is the radius of the circle.
Hence...
3.141592654 x (3 x 3) = 28.274334 square inches
2007-05-20 08:56:59 · answer #7 · answered by martythepigpilot 2 · 0⤊ 0⤋
A = πr². r, the radius, is half the diameter. This gives you r = 3, and substituting,
A = π(3)² = 9π square inches.
2007-05-20 08:55:12 · answer #8 · answered by Anonymous · 0⤊ 0⤋
Area = πx radius^2
A = π x 3^2
A = π 9
A= 28.3 sq in
2007-05-20 08:56:01 · answer #9 · answered by Anonymous · 0⤊ 0⤋
a=pir^2
a=pi(3)^2
a=9pi
2007-05-20 08:54:03 · answer #10 · answered by leo 6 · 0⤊ 0⤋