When you say "a 20 inch circle", I'm going to assume you mean the distance
all the way across it, through the center ... that is, the circle's "diameter".
The area of a circle is (pi) x (Radius)2 = (pi) x (100) = 314.159 square inches (rounded)
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The area of a circle is calculated using the formula A = πr^2, where r is the radius (half the diameter). In this case, the radius is 1.5 inches (half of 3 inches). So, the area of the circle is A = π(1.5)^2 = 7.07 square inches.
Area of a circle = πr²
A = 3.14159 × (4.5)² (remember that r or radius is exactly half of the diameter)
A = 3.14159 × 20.25
A = 63.62 in²
A 56-inch diameter circle has an area of about 17.06 square feet.
The diameter of a circle can be calculated using the formula: diameter = circumference / π. In this case, the diameter would be approximately 33 inches.
The area of the circle is πr^2 = (π(10/2)^2) = 25π square inches. The area of the square is 10^2 = 100 square inches. The area of the region inside the square and outside the circle is 100 - 25π = 21.46 square inches.
If 36 inches is the diameter the answer is: 7,068 square feet.
The area of a circle is calculated using the formula A = πr^2, where r is the radius of the circle. The radius of the dinner plate is 5.5 inches (half of the diameter), and the radius of the salad plate is 4 inches. The area of the dinner plate is 95.03 square inches (π * 5.5^2), while the area of the salad plate is 50.27 square inches (π * 4^2). The dinner plate covers 44.76 square inches more than the salad plate.