The radius of a circle is 6.5. What is the diameter, circumference, and area?
2 Answers
Diameter :
Circumference :
Area :
Explanation:
The diameter is 2 times the radius so the diameter of this circle is 13.
The circumference of a circle of radius
The area of a circle of radius
See solution below
Explanation:
Diameter:
The diameter is always double the length of the radius.
Assuming d represents diameter:
d = 6.5(2)
d = 13
The diameter of the circle measures 13.
Circumference
The formula for circumference of a circle is dπ, where d is diameter and π is pi.
Now that we know the length of the diameter, we can find the circumference, or distance around the circle.
Assuming that C represents circumference
C = dπ
C = 13π
C = 13π or 40.84
The circumference measures 13π (exact value) or 40.84 (rounded to the nearest hundredth).
Area
The formula for area is A =
A =
A =
A = 42.25π or 132.73
The area is 42.25π
Hopefully you understand some of the characteristics of circles now!