The floor of a round hut has a diameter of 6meters. What is the floor's circumference?
The most commonly used equation for circumference is C=2πr. Where c is the circumference, π is pi (or 3.14159...), and r is the radius.
In your equation, you are given diameter. Remember that the radius is half of the diameter. So, in this case, the radius, r, is half of 6, or 3 meters.
Now, substitute the radius into the equation for circumference, and you get:
= approximately 18.84 meters
What you know have found is the distance around the circle.
the formula for circumference is 2*π*r or d*π.
π= pi which is approximately 3.14
Thus the answer can be given as 6π meters OR approximately 18.84 meters.
We'll recall the formula that gives the circumference of a circular shape:
C = 2`pi` r, where r represents the radius of the circle.
The diameter of the circle is twice the radius of the circle, therefore, the circumference is:
C = D*`pi`
C = 6`pi`
If we'll take pi = 3.14, we'll get:
C = 6*3.14
C = 18.84 meters
Therefore, the circumference of the floor of the round hut is C = 18.84 meters.