2007-08-19 07:54:20 · 11 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
9 inches
2007-08-19 07:58:04 · answer #1 · answered by Robert M 1 · 0⤊ 0⤋
You know the formula for the area of the square:
Well here it is:
Area of a square = side ^ 2
or if u write in short form, its:
A = s ^ 2
We know the area, which is 81, so put 81 in place of A
so its:
81 = s^2
take the square root on both sides since u need to find 's'
so, s = 9, and the unit is inches, so 9 inches is ur answer!
2007-08-19 08:04:45 · answer #2 · answered by Anonymous · 0⤊ 0⤋
9
2007-08-19 08:03:12 · answer #3 · answered by Dreams 2 · 0⤊ 0⤋
Ok, so you know that the shape is a square, and you have the area.
The formula for the area of a square is s^2. And the area is 81 square inches, so your formula is:
s^2 = 81"
Then you just work backwards, rearranging your formula so you get:
sqrt(81") = s
9" = s
Therefore one side is equal to 9".
2007-08-19 08:27:59 · answer #4 · answered by Anonymous · 0⤊ 0⤋
Area of a square=(side)^2=81sqin=(9)^2
so the length(=bredth)=9 in
2007-08-19 08:00:25 · answer #5 · answered by MAHAANIM07 4 · 0⤊ 0⤋
If it is square, it must have sides that are the square-root of 81 inches...so "9 inches"...
2007-08-19 08:00:41 · answer #6 · answered by Anonymous · 0⤊ 0⤋
a^2 = 81
a = √81 = 9 in.
2007-08-19 07:58:31 · answer #7 · answered by sahsjing 7 · 0⤊ 0⤋
sqrt(81) = 9 inches
2007-08-19 07:58:18 · answer #8 · answered by ironduke8159 7 · 0⤊ 0⤋
the area of a sq. is the size of one side situations the size of one side, in different words, area = s^2. because you're given the area, take the sq. root of it to get the size of one side. The sq. root of 80 one is 9, so the respond is D.
2016-12-15 19:40:46 · answer #9 · answered by hillhouse 4 · 0⤊ 0⤋
the card board would be 9in. by 9in. so the length of the cardboard would be 9 in.
2007-08-19 08:01:32 · answer #10 · answered by Anonymous · 0⤊ 0⤋