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Please, can you give me help with the answer #1- #2 and #3. Thanks

Please, can you give me help with the answer #1- #2 and #3. Thanks-example-1
User Andyfeller
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1 Answer

3 votes
the formula for circumference is 2
\pir and are is
\pir²
#1 c=20×pi×2=40pi
a=20²×pi=400pi
User Bradym
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