Take the measurement of one side, and multiply it by itself (basically the side next to it, but since it's a square, they will be the same) and you have the total area of the square. For example, a square that is 6 inches x 6 inches would have a total area of: 6 x 6 = 36 square inches.
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Multiply the length [in feet] times the width [in feet] and then the answer would be the total square footage.
Find the total area of the square: length times height. Next, find the total area of the circle: Pi times radius to the second power, or Pi(r squared). If you are doing this by hand, 3.14 is usually acceptable for Pi. Once you have the are of both the square and the circle (the area of the circle should be smaller than that of the square), subtract the area of the circle from the area of the square. The difference is the area of those extra corners of the square that the circle does not occupy. It is actually quite simple. This demonstrates the danger of thinking in words rather than pictures.
Total surface area = (2*pi*r2)+(pi*r2) Area = 300*pi in square units
HOW TO FIND THE AREA OF A SQUAREmust x all sides
The formula for the area of a square is A=s2. So to find the sidelength, find the square root of the area.