2
c=2πr c/2π=r So: 3397/(2π)=r r=540.6
The formula; 2 * Pi * Radius = circumference Will calculate the circumference of a circle.
diameter = circumference/pi
You cannot find the diameter of something from its circumference unless it is a circle and, in that case, diameter = circumference/pi
circumference = pi x diameter
c=2πr c/2π=r So: 3397/(2π)=r r=540.6
3397 is a single number. A single number does not have a radius.
The Sun is 875,000 miles across, though scientists usually use AU which is Astronomical units or they would use kilometers. In which case it is 1,392,000 kilometers across/ wide and the radius of the Sun is about 700,000 km (435,000 miles). Mars has a diameter of 6,800 km or 4,200 miles across. The radius of mars is 3397 km at equator, 3375 km at pole. But if you want to find how much bigger it is than you can do some math and figure it out yourself and i bet your teacher will be very impressed too!
circumference = 2 x pi x radius radius = circumference/2 x pi
To find how big is the earth in miles, you can measure the circumference about the equator. This is approximately 24,900 miles. However, the circumference about the poles is slightly smaller at 24,859 miles.
That's nominally 1/4 of the Earth's polar circumference, which you can easily find online.
From the equator the earth is 24,901.55 miles in circumference or 40,075.16 kilometers. Measured from North pole back around to North pole, the circumference is 24,859.88 miles or 40,008 kilometers.
The formula; 2 * Pi * Radius = circumference Will calculate the circumference of a circle.
Pi X D = Circumference. To find Diamater if you know Circumference, divide Circumference by Pi (3.14).
Diameter = Circumference/pi
Circumference = π * Diameter
You divide the circumference by pi.