圆台侧面积公式为什么是这个书上给的公式是 S=π(r'²+r²+r'l+rl)我能理解πr'²+πr²是上下底面积扇环面积不能理解,为什么是 π(r'l+rl)
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/17 19:20:09
![圆台侧面积公式为什么是这个书上给的公式是 S=π(r'²+r²+r'l+rl)我能理解πr'²+πr²是上下底面积扇环面积不能理解,为什么是 π(r'l+rl)](/uploads/image/z/4950734-14-4.jpg?t=%E5%9C%86%E5%8F%B0%E4%BE%A7%E9%9D%A2%E7%A7%AF%E5%85%AC%E5%BC%8F%E4%B8%BA%E4%BB%80%E4%B9%88%E6%98%AF%E8%BF%99%E4%B8%AA%E4%B9%A6%E4%B8%8A%E7%BB%99%E7%9A%84%E5%85%AC%E5%BC%8F%E6%98%AF+S%3D%CF%80%EF%BC%88r%27%26sup2%3B%2Br%26sup2%3B%2Br%27l%2Brl%EF%BC%89%E6%88%91%E8%83%BD%E7%90%86%E8%A7%A3%CF%80r%27%26sup2%3B%2B%CF%80r%26sup2%3B%E6%98%AF%E4%B8%8A%E4%B8%8B%E5%BA%95%E9%9D%A2%E7%A7%AF%E6%89%87%E7%8E%AF%E9%9D%A2%E7%A7%AF%E4%B8%8D%E8%83%BD%E7%90%86%E8%A7%A3%2C%E4%B8%BA%E4%BB%80%E4%B9%88%E6%98%AF+%CF%80%EF%BC%88r%27l%2Brl%EF%BC%89)
xVRP~V@tׂOU;CL} *vNU|$a+܀]:nBr{/:#chFC2R@54IodpAmkԴ,|23Ty懴6$R!953kgV-ow>?(8|eoD/łU;w9/'{'+ĉ}gKb^OQc?W6ې&K6q /L^VbZ(/̻]Eqa4ͭX&W&PzS-k0>cm60:ыvgF,{if)118!P0dPͳ[28uX7^iV(bODbf:~ma
Wx6k49]G9&