What is the relationship between radius (r) and diameter (d) of a circle?
r = d/2
d = 2r
d = r
d = 4r
What is the circumference of a circle with a radius of 10 cm? Answer in terms of Pi
10Pi
5Pi
20Pi
Pi
What is the diameter of a circle with circumference of 314 cm? Assume Pi = 3.14
100
50
200
314