Green
Radius: 16/2=8cm
Diameter: 16cm (given)
Formula: I'm not sure what formula this chart is asking for. But assuming it's the formula for circumference that would be 2πR (2 times pi (3.14) times the radius). If this isn't the formula the chart is looking for let me know what formula you need and I'll try to help you out with that
Circumference: 2pi Radius=2(3.14)8=50.24 cm
Yellow
Radius: 11/2=5.5
Diameter: 11cm (given)
Formula: 2πR
Circumference:2 pi R=2(3.14)5.5 =34.54 cm
Pink
Radius: 1 cm
Diameter: 2 cm
Formula: 2πR
Circumference: 2piR=2(3.14)1=6.28 cm
