find the length of a side of a square whose area is 400 cm^2
Area equals length times width. A square has equal length sides so the answer is a number times itself that comes out to 400. 20 x 20 = 400. The length of each side is 20cm.
Well, since the area of a square is given by multiplying the length of one side by itself, we can say that the side length squared equals the area. In this case, we have:
Side length * Side length = 400 cm^2
To find the length of one side, we need to take the square root of both sides:
√(Side length * Side length) = √400 cm^2
And that simplifies to:
Side length = √400 cm^2
Now, the square root of 400 is 20, so:
Side length = 20 cm
Therefore, the length of one side of a square with an area of 400 cm^2 is 20 cm. Now go out there and measure some squares!
To find the length of a side of a square whose area is 400 cm^2, you can use the formula for the area of a square, which is side length multiplied by side length.
Let's say the length of one side of the square is 's'. According to the given information, the area of the square is 400 cm^2. Therefore, we can write the equation:
s * s = 400
To solve for 's', we can take the square root of both sides of the equation:
√(s * s) = √400
s = √400
Calculating the square root of 400, we get:
s = 20 cm
Therefore, the length of each side of the square is 20 cm.