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.
What is the diameter of 4 cm?
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.
What is r 4cm?
r=4cm. The area of a circle is equal to Pi π times the radius r squared. π⋅(radius)2. Substitute in the value of the radius r=4 into the formula for the area of a circle. Pi π is approximately equal to 3.14 .
What is the circumference of 4 cm diameter?
Therefore, Circumference of the circle is 4π cm.
What is the circumference of 4 cm in a circle?
The circumference is 8πcm or 25.12cm .
What is the formula of 4 cm?
To transform 4 centimeters into centimeters, you just need to multiply the quantity in centimeters by the conversion factor, 0.01. So, 4 centimeters in centimeters = 4 times 0.01 = 4 centimeters, exactly.
What’s the area of a 4 cm circle?
1.94835 square inches (in²)
How to calculate the diameter of a 2 cm circle?
Diameter of 2 cm radius circle is pi x r2 = 3.1416 x 4 cm2 = 12.5664 cm2 Circumference of 2 cm radius circle = pi x 2r = 3.1416 x 4 cm = 12.5664 cm What is the radius of a circle that has a diameter of 8 cm with formula?
How big is the radius of a circle?
Length of a radius is always half the diameter of a circle. This means that the circle has a radius of 2cm. Diameter of circle..its radius?
What is the area of a 4cm circle?
If the radius of a circle is 4cm, what is the area? π is a button on your calculator you can find, but is also generally known as 3.14, you can use either one, but teachers usually prefer you use the π button.
How big is the diameter of a motorcycle wheel?
A motorcycle wheel is a 3 dimensional object and as a result would have volume and not area. Additionally it is very, very rare to find a motorcycle with a wheel that has a diameter of 1 meter, approximately 39.4 inches. Bridgestone only sells motorcycle tires from 14″ to 23″ for on road bias ply tires. But ignoring all that…
