弦長72m,半徑134米 弧長是多少?速求!
弦長72m,半徑134米 弧長是多少?速求!
數(shù)學(xué)人氣:358 ℃時(shí)間:2020-06-14 10:57:24
優(yōu)質(zhì)解答
sin(A/2)=36/134A/2=arc sin 36/134=15.584349282292838999067965031701.°A=31.168698564585677998135930063402.°C=2*134*π=841.94683116206458790798842671891.m弧長=C*A/360=72.895519410829174186152384798706...
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