The area of a minor sector is 10% of the area of a circle with radius 50 cm.?
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The angle is 36 degrees (10%). The chord length is 30.901699 cm = 2*50*cos(90-36/2) cm.
820614
So am I answering a homework question for you? lol\n\nCircles have the minimal perimeter for the area contained.\nArea of a circle is pi x Radius x Radius. (pi R squared)\n\nNext best would be something close to a circle, so consider a hexagon or octagon, with the corners of the square intersecting the vertices of the outer figure.\n\nLet's try a circle first...\n\nDiameter of the circle would be the diagonal of the square, or five times the square root of two.  5 x 1.414 = 7.07.  So the Radius is 3.535 meters.\n\nPi x 3.535 x 3.535 = 3.14 x 12.5 = 39.34\n\nSo the circle solution is too big.\n\nNow work out on paper what an octagon or hexagon surrounding the square would look like.  One of those should be about 34 m square.  Remember the area of the square is already 25 m2, so you are looking for only 9 more m2.\n\nI played around for minute or so in paint, and came up with a parallelogram that worked too.  Finally, a smooth curving perimeter shape get you benefits similar to the "circle" solution, so an ellipse would be a good comparison solution.  Try that, and compare the perimeter result against the perimeter of the parallelogram, which has a perimeter of 24.23 meters.\n\nHave fun!\nOC
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inner surface area of a conduit of inner diameter d and length l = pi*d*h\nherd d = 10mm= 0.01 m\nand h = 5m\nso inner surface area = pi*0.01*5\n= 0.157  m squared
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rare gem's answer is right..given the radius you'll just need to compute for the area using the formula right?\n\nArea=(radius^2)(pi)\n    = (5)(5)(pi)
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Math tutorials. (50-10)/ 50 = 0.8 or 80%
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49.87\n\nThe entire area is 1. So half the area (from the mean to the highest STD measured) will approach 50%, never more.\n\nThe chart on the link below shows 99.74% for the curve from -3 to +3, so half is 49.87, slightly higher at 3.01, but this is the answer due to rounding.\n\nJOE
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Each side would have length sqrt(3), so the area would be 3 m^2.
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100\n\n(10mm=1cm; 10x10=100)
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The area equation of a circle is pi r^2. And, a circle has an arc measure of 360. Since the shaded region has that of 40, it would be 40/360 = 1/9 of a circle.\nA = 1/9 pi r^2 = 59\npi r^2 = 59 x 9\nr^2 = 59x9/pi\nr = sqrt 59 x 9/pi = 13! =)
572487
Distribution of force over area.
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Circumference= 8pi = 25.12\nArea= 4^2 pi = 50.24\nArea of smaller sector= 12.56\nArea of smaller segment = 37.68\n\nYour question was unclear, so answers may reflect that.
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Area of a circle = pi x r^2 =3.1416 x 4^2=50.265 cm^2\nArea of a circle = pi x (d^2)/4 = 3.1416 x (8^2)/4 = 50.265 cm^2\n\nCircumference of a circle = pi x diameter = 3.1416 x 8 =25.133 cm\nCircumference of a circle = pi x 2 x radius = 3.1416 x 2 x 4 =25.133 cm
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How to do this problem:\n1. Find the Radius. To do this, take the diameter and divide by two. This gives you a radius of 5.\n2. Because the Area of a circle is equal to Pi times the radius squared, and your teacher wants the answer in terms of pi, square the radius and get 25 pi.
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Assuming that A, B, C are all on the same line.\n\nLarger circle:\nRadius = AC = 6\nArea = PI * r^2 = 36*PI\n\nSmaller circle:\nRadius = AC - AB = 6 - 2 = 4\nArea = PI * r^2 = 16*PI\n\nShaded area:\nArea = (Large A) - (Small A)\n     =  36*PI - 16*PI = 20*PI = 62.8 units^2
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It is said that the area of a circle is Pi R square.  Pie are not square. Pie are round, cornbread are square.
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4.00751601 × 10^9 centimeters
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The formula for the area of a circle is:\nPi*r^2/2\nto translate, "one half of Pi times the suare of the radius"\n\nSo, if you have a 3 cm radius:\n(3 cm)(3 cm) = 9 cm^2\n\nthen divide by two:\n9 cm^2 /2 = 4.5 cm^2\n\nthen multiply by Pi:\n\n4.5(Pi) cm^2\n\nIf you want a decimal number, you can use an estimation of Pi, something like 3.1415, but it's not exact since Pi is an irrational number (a non-ending and non-repeating decimal)