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c=2#r s=#rr 根據公式圓的周長和面積都與半徑成正比! 所以圓的周長越長,圓的面積就越大.正確的!
圓的周長=2πr,周長與半徑成正比,周長越大,半徑越大,則面積就越大.所以原題說法正確.故答案為:√.
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