what is the area of a plate with a 5 inch raduis use 3.14 for pi
2007-05-09 15:06:26 · 7 answers · asked by Jason S 2 in Science & Mathematics ➔ Mathematics
area of a circle is pir^2
5^2(3.14)=78.5in^2
2007-05-09 15:10:23 · answer #1 · answered by Anonymous · 0⤊ 0⤋
A= Pi x Radius x Radius
3.14 x 5 x 5=
3.14 x 25 =
78.5 in. squared
2007-05-09 22:15:03 · answer #2 · answered by Starstruck 3 · 0⤊ 0⤋
The diameter is the radius squared, or (r*r). So, 25 inches is the diameter. Pi times 25 = 78.5 inches = circumference, or area. So in all, that is how you solve for the area when given a radius. Your answeris 78.5 inches. Hope you understand this and that I could be of some help! ;-)
2007-05-09 22:13:54 · answer #3 · answered by MW 5 · 0⤊ 0⤋
78 1/2
2007-05-09 22:14:16 · answer #4 · answered by schedulatir 2 · 0⤊ 0⤋
Area = Ïr²
Area = (3.14)(5)²
Area = 78.5 cm²
.
2007-05-09 22:11:06 · answer #5 · answered by Robert L 7 · 0⤊ 0⤋
A = (pi)(r)^2
A = (3.14)(5)^2
A = 3.14(25)
A = 78.5
2007-05-09 22:10:45 · answer #6 · answered by JirafaBo 2 · 0⤊ 0⤋
a= PI * r^2
a=3.14 * 25
a=78.50
2007-05-09 22:11:26 · answer #7 · answered by jzimmerman56301 4 · 0⤊ 0⤋