It is the length of the diameter multiplied by itself, with the units being the square of the units used for measuring the diameter.
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The square of the diameter of a circle is equal to four times the square of the radius of the circle. This relationship arises from the formula for the diameter of a circle, which is two times the radius, and squaring both sides of this equation.
A 56-inch diameter circle has an area of about 17.06 square feet.
The suspension line length can be calculated using the Pythagorean theorem. The length of the suspension line is the square root of the difference of the square of the diameter and the square of the distance from the parachute to the center of the diameter. In this case, it is √(15^2 - 8^2) = √(225 - 64) = √161 ≈ 12.69 ft.
If 36 inches is the diameter the answer is: 7,068 square feet.
The formula to find the square feet for a round area would be (3.14 x (diameter / 2squared)) or (0.785 x diameter squared). .785 x 18squared = 254.34 sq ft
Mars has a surface area of about 55 million square miles, while Earth's surface area is approximately 197 million square miles. Therefore, Earth is about 3.6 times larger in terms of size than Mars.