半径/母線が側面の角度になります。母線をrとおくと、5/r+3/r=8/r これが円になるので、8/r=360/360=1、r=8
8*8*π*5/8=40π
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半径/母線が側面の角度になります。母線をrとおくと、5/r+3/r=8/r これが円になるので、8/r=360/360=1、r=8
8*8*π*5/8=40π
Users viewing this question
are also looking at these questions 😉
ありがとうございます‼︎