a circle has an area of 200pie cm sq find the radius
how do i do that??
2007-10-02 16:44:19 · 5 answers · asked by Pinkt41 2 in Science & Mathematics ➔ Mathematics
A=(pi)r2 <---radius squared
200(pi) = r2(pi)
200 = r2
r = square root of 200
2007-10-02 16:48:34 · answer #1 · answered by Anonymous · 0⤊ 0⤋
area of a circle = (pi)*r^2 Circumference = 2 (pi) *r the place r= the radius. If the area is 36 pi squarecm, the radius would desire to be 6 cm--this is, the sq. root of (36*pi/pi) Plugging 6 into the formula for circumference makes the circumference 12 pi.
2016-12-28 12:12:29 · answer #2 · answered by luby 4 · 0⤊ 0⤋
the area of a circle is:
A=pi x r²
If you know that the area is pi x 200 then your radius is the square root of 200.
2007-10-02 16:49:21 · answer #3 · answered by Anonymous · 0⤊ 0⤋
A = π r ²
r ² = A / π
r = √ ( A / π)
r = √ (200 π / π)
r = √ 200
r = 10√2 cm
2007-10-02 20:14:50 · answer #4 · answered by Como 7 · 2⤊ 0⤋
i'm familiar with the greek letter pi which represents a certain number (~ 3.14), but what is "pie"? apple, cherry, blueberry, shoo-fly, banana cream, etc.?...tell us!
2007-10-02 16:48:39 · answer #5 · answered by Anonymous · 1⤊ 1⤋