Circumference
Formula for circumference from diameter
C=d pi
Formula for radius from the diameter
R=1/2D
Formula for diameter from radius
d=r2
formula for area from radius
A = pi r²
If the diameter of the circle is 5, what is the circumference? (Use 3.14)
15.7
If the radius of a circle is 27 what is the circumference? (use 3.14)
169.59
If the diameter of a circle is 5.85, what is the radius? (Use 3.14)
2.925
If the circumference of a circle is 6.23, what is the diameter? (use 3.14)
1.98 (Rounding)
If the radius of a circle is 2.24, what is the area? (use 3.14)
15.76 (Rounding)
If the area of a circle is 9, what is the radius? (Use 3.14)
1.69 (rounding)