Step-by-step explanation:
Answer:
1. radius= 11cm, diameter= 22cm
A= 3.14(11)²
A= 3.14(121)
A=379.94 cm²
2. radius= 40 cm, diameter= 80 cm
A= 3.14(40)²
A=3.14(1600)
A= 5,024 cm²
3. radius= 20 mm, diameter= 40 mm
A= 3.14(20)²
A= 3.14(400)
A= 1,256 mm²
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Step-by-step explanation:
1. R = 11 cm
D = 22 cm
A = 379.94 cm
2. R = 40 cm
D = 80 cm
A = 5,024 cm
3. R = 20 mm
D = 40 mm
A = 1,256 mm
Answer:
1. radius= 11cm, diameter= 22cm
A= 3.14(11)²
A= 3.14(121)
A=379.94 cm²
2. radius= 40 cm, diameter= 80 cm
A= 3.14(40)²
A=3.14(1600)
A= 5,024 cm²
3. radius= 20 mm, diameter= 40 mm
A= 3.14(20)²
A= 3.14(400)
A= 1,256 mm²