Step-by-step explanation:
A= πr²
A= π= 3.14
A= 20÷2= 10
A= r²= 10×10= 100
A= 3.14×100= 314cm
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Step-by-step explanation:
A= πr²
A= π= 3.14
A= 20÷2= 10
A= r²= 10×10= 100
A= 3.14×100= 314cm