how to find diameter in radius?
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.
1415711
['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.']
751943
The diameter is always twice the radius, so either form of the equation works. This formula reads, “Area equals pi are squared.” Find the radius, circumference, and area of a circle if its diameter is equal to 10 feet in length. so the area is about 78.5 square feet.
291284
Circumference (C in black) of a circle with diameter (D in cyan), radius (R in red), and centre (O in magenta). Circumference = π × diameter = 2π × radius.
751490
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!
1178802
2 pi r is the way to find the circumference when you have the radius. Comment on Aydia C's post “2 pi r is the way to find the circumference when y...”
1053205
To calculate the diameter of a circle, multiply the radius by 2. If you don't have the radius, divide the circumference of the circle by π to get the diameter. If you don't have the radius or the circumference, divide the area of the circle by π and then find that number's square root to get the radius.
72517
The circumference = π x the diameter of the circle (Pi multiplied by the diameter of the circle). Simply divide the circumference by π and you will have the length of the diameter. The diameter is just the radius times two, so divide the diameter by two and you will have the radius of the circle!
982362
The Radius is the distance from the center outwards. The Diameter goes straight across the circle, through the center. The Circumference is the distance once around the circle. ... When we divide the circumference by the diameter we get 3.141592654...
444026
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.
410105
Divide the circumference by pi, approximately 3.14, to calculate the diameter of the circle. For example, if the circumference equals 56.52 inches, divide 56.52 by 3.14 to get a diameter of 18 inches. Multiply the radius by 2 to find the diameter.
1322749
The radius is the distance from the center of the circle to its edge. If the radius of the circle is 4 cm, then the diameter of the circle is 4 cm x 2, or 8 cm. If you know the circumference of the circle, divide it by π to get the diameter.
597793
Keeping this in mind, you can write down the formula for finding the circumference of a circle given the radius: C = 2πr. In this formula, "r" represents the radius of the circle. Again, you can plug π into your calculator to get its numeral value, which is a closer approximation of 3.14.
535467
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. hope this helps!
721278
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.
527265
Using the Radius 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.
1289457
The distance from the center to a point on the circle is called a radius. Every circle has an infinite number of possible diameters. The formula for finding the diameter of a circle is two times the radius (2 * radius).