Answer:
1. radius: 11mm
circumference: 69.08mm
2. radius: 10cm
circumference: 62.8cm
3. diameter: 10m
circumference: 31.4m
4. diameter: 16dm
circumference: 50.24dm
Step-by-step explanation:
1. radius: 22 ÷ 2 = 11mm
circumference: 3.14 x 22 = 69.08mm
2. radius: 20 ÷ 2 = 10cm
circumference: 3.14 x 20 = 62.8cm
3. diameter: 5 x 2 = 10m
circumference: 3.14 x 10 = 31.4m
4. diameter: 8 x 2 = 16dm
circumference: 3.14 x 16 = 50.24dm
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Answer:
1. radius: 11mm
circumference: 69.08mm
2. radius: 10cm
circumference: 62.8cm
3. diameter: 10m
circumference: 31.4m
4. diameter: 16dm
circumference: 50.24dm
Step-by-step explanation:
1. radius: 22 ÷ 2 = 11mm
circumference: 3.14 x 22 = 69.08mm
2. radius: 20 ÷ 2 = 10cm
circumference: 3.14 x 20 = 62.8cm
3. diameter: 5 x 2 = 10m
circumference: 3.14 x 10 = 31.4m
4. diameter: 8 x 2 = 16dm
circumference: 3.14 x 16 = 50.24dm