0
What is the formula for finding cirumference when you just have the radius?
Wiki User
∙ 10y ago
It is: 2*pi*radius
Wiki User
∙ 10y ago
Add your answer:
Earn +20 pts
How do you find the radius by using the cirumference?
Circumference= 2(Pi)r so just work backwards :)
What is the formula for finding the diameter of a circle when the circumference is given?
C = pi d By algebraic rearrangement d = C / pi
If you are given a radius and asked to find the diameter what do you do?
You just multiply the given radius by 2. That is diameter is just double of the radius. This is universal formula.
Why is it so important to know the circumference of a circle when finding the surface area of a cylinder?
It is not. Knowing its radius or diameter will do just as well.It is not. Knowing its radius or diameter will do just as well.It is not. Knowing its radius or diameter will do just as well.It is not. Knowing its radius or diameter will do just as well.
What is the equation for finding the radius of a sphere?
That depends what you know about the sphere. For example, if you know the diameter, just divide it by 2 to get the radius.
Formula of diameter of a circle?
the diameter is the radius of a circle times 2. you just double the radius.
How do you find the area of a semi-circle radius 10cm?
πr² is the formula for finding the area of a circle. To find the area of a semicircle just divide the answer by two. So take the radius, square it, which in this case would be 100, multiply it by π [pi (3.14)] and divide it by two.
How can you determine the area of a circle by using the radius squared and without finding the radius?
The area of a circle is pi * radius2. If you already have the radius squared, you just have to multiply that by pi.
What is the volume of a sphere with a radius of 15 units?
Just insert the radius into the formula for the volume a sphere, and do the calculations. The formula is: V = (4/3) pi radius3
What is the area of Pluto in kilometers?
just get the radius of pluto and put in this formula:4 multiplied by radius sqrared multiplied 3,14
How do you determine the circumference of a circle if you know the radius?
use the formula pi*diameter = circumference and the formula diameter = 2*radius and combine them 2pi*radius = circumference now you have a formula that you can just plug you numbers into. if you have 3 as your radius, then this is how to find the circumference 2pi*3=circumference 6.28*3=circumference 18.84=circumference
How can kids remember the formula for circle area and the formula for circle circumference?
Any formula involving a circle will have "pi" in it. Area = pi* radius * radius Circumference = pi * diameter = pi * radius * 2 ( the diameter is just 2 times the radius) Quick way: A = pi r squared C = pi D
