Circles: Radius & Diameter

Calculate the radius and diameter of each circle. a) radius = 5 mm diameter = 10 mm b) radius = 6 cm diameter = 12 cm c) radius = 9 m diameter = 18 m d) radius = 8 km diameter = 16 km e) radius = 11 m diameter = 22 m f) radius = 15 mmdiameter = 30 mm g) radius = 13 kmdiameter = 26 km h) radius = 7 cmdiameter = 14 cm i) radius = 9 kmdiameter = 18 km j) radius = 1 mdiameter = 2 m k) radius = 17 cmdiameter = 34 cm l) radius = 25 mmdiameter = 50 mm m) John has a round swimming pool. The distance from the center of the pool to the edge is 3 meters. What is the diameter of John's pool? m) diameter = 6 m