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我想做個上口直徑d1=80釐米下口直徑d2=30頗高h =40的錐形漏斗,請朋友幫助,請繪出扇形圖?扇形的大圓弧半徑為R1,小圓弧半徑為R2,弧所對的圓心角為A.R1-R2=(h^2+((d1-d2)/2)^2)^0.5=(40^2+((80-30)/2)^2)^0.5=47.1699A=P…
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