how to find radius and diameter of circle?
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Just remember to divide the diameter by two to get the radius. If you were asked to find the radius instead of the diameter, you would simply divide 7 feet by 2 because the radius is one-half the measure of the diameter. The radius of the circle is 3.5 feet. You can also use the circumference and radius equation.
839005
multiply. pi times diameter. solve for circumference of a circle.
529630
First, double the radius to get the diameter (radius x 2, or radius + radius). One you have the diameter, you can use the equation C = πd. If you want to know the circumference of a cookie that has a radius of 2 inches, for instance, start by doubling the radius to get the diameter: 2 x 2 = 4.
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['Measure the circular base to get the diameter.', 'Divide the diameter by 2 to get the radius.', 'Calculate the area with the formula: A = πr^2, where r is the radius.', 'Measure the height of the cylinder.', 'Multiply the area by the height to get the Volume.']
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Area of a circle. In geometry, the area enclosed by a circle of radius r is π r2. Here the Greek letter π represents a constant, approximately equal to 3.14159, which is equal to the ratio of the circumference of any circle to its diameter.
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Take the circumference of a circle and divide it by Pi. For example, if the circumference is 12.56, you would divide 12.56 by 3.14159 to get 4, which is the diameter of the circle. Use the diameter to find the radius by dividing the diameter by 2. For example, if the diameter is 4, the radius would be 2.
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That is: V = pi*(r^2)*h. We can solve this equation for r in order to calculate radius when given volume and height. We'll go over that process in the video, but what we end up with is r = sqrt(V/(pi*h)). We can then double the radius to find the diameter of the cylinder!
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Divide the area of the circle by π, and then calculate the square root to find the radius. For example, the area of the circle is 100 square feet. Dividing by π equals 31.839. The square root of 31.839 is 5.649 feet.
72495
Well, to get the radius from the circumference of a circle, you would divide it by 2 pi. pi and pi cancel out and we have... If we were to find diameter from a circumference, we only need to divide by pi since 2*r = diameter.
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Divide the length of the diameter in half to find the footage of the radius. For example, if the diameter is 10, the radius is 5. Divide the circumference by 2π to find the radius.
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Cylindrical Tanks Another way to find the radius is to divide the diameter, or width, by two. Square the radius by multiplying the radius times itself and then multiply it by 3.1416, which is the constant pi. Multiply this number by the height to determine the cubic volume in inches.
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The two formulas that are useful for finding the radius of a circle are C=2*pi*r and A=pi*r^2.
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The two formulas that are useful for finding the radius of a circle are C=2*pi*r and A=pi*r^2. We use algebra skills in solving for our variable r.
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Answer: Diameter is 82 cm. The area of a circle is equal to the sum of the areas of two circles of radii 40 cm and 9cm. It means the radius of big circle is 41 cm and diameter is 82 cm.
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Solve the equation for the diameter of the circle, d= C/π. In this example, "d = 12 / 3.14." or "The diameter is equal to twelve divided by 3.14." Divide the circumference by pi to get the answer. In this case, the diameter would be 3.82 inches.
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The diameter of a circle multiplied by pi gives you the circumference, or the distance around the circle. Draw two lines from the radius of your circle, each connecting to one of the two points you're using to measure arc distance.
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The formula for finding the diameter of a circle is two times the radius (2 * radius).