2007-02-18 03:22:00 · 19 answers · asked by jo s 1 in Science & Mathematics ➔ Mathematics
Area is equal to pi (3.14) * radius (2.8cm) squared
so:
3.14 * 2.8cm^2 = Area
3.14 * 7.84 cm^2
24.62 m^2 is the area of the circle
2007-02-18 03:29:03 · answer #1 · answered by ? 6 · 0⤊ 0⤋
Area = Pi * r^2 = Pi * (2.8cm)^2 = 24.63008641 cm^2
2007-02-18 11:30:09 · answer #2 · answered by Dalilur R 3 · 0⤊ 0⤋
Just do...
2.8 x 2 =.... (Radius x 2 = diameter)
2.8 x 3.14=...(3.14 equal equals the pi, which is what you need to do to find the area)
To find the diameter from the radius, just double it.
To find the area, just times the diameter by 3.14
3.14 is to be exact, you can x it by 3, but depends on what level of work you're doing.
2007-02-18 11:47:20 · answer #3 · answered by Earth 4 · 0⤊ 0⤋
Area of circle is pi*r*r
pi= 3.14 or 22/7
r = radius of circle
so area of circle = 24.6
2007-02-18 11:29:29 · answer #4 · answered by aparna k 1 · 0⤊ 0⤋
Area of a circle = Ï x r² = 3.142 x 2.8 x 2.8
(I've rounded off Ï to 3 decimal places.
= 24.633 cm²
2007-02-18 21:36:31 · answer #5 · answered by Norrie 7 · 0⤊ 0⤋
Area = Pie x 2.8 squared
2007-02-18 11:24:30 · answer #6 · answered by gona-b-a-gr8 2 · 2⤊ 0⤋
Pi*2.8*2.8
2007-02-18 11:25:08 · answer #7 · answered by piyush 2 · 1⤊ 0⤋
Area of a circle formula
A = Ï r²
A = 3.141592654(2.8)²
A = 3.141592654(7.84)
A = 24.6300864 centimeters square
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2007-02-18 11:29:35 · answer #8 · answered by SAMUEL D 7 · 0⤊ 0⤋
Area = Ïr² = (2.8)² Ï = 8.48Ï cm².
2007-02-18 12:16:34 · answer #9 · answered by steiner1745 7 · 0⤊ 0⤋
EVERYBODY knows pi R squared.
2007-02-18 11:28:52 · answer #10 · answered by David H 6 · 0⤊ 0⤋