最新《圆柱的表面积》课件PPT86748演示教学.ppt 22页

' 301010做一个圆柱形纸盒,至少需要用多大面积的纸板?(接口处不计) 这是要求圆柱的表面积.圆柱的底面积容易求,圆柱的侧面积怎么求呢？ ty.qiugj.com/aeef/2256.htmlty.oqyzl.com/837d/2269.htmlty.btwvf.com/f18c/2301.htmlty.dwxbi.com/1dbe/2290.htmlty.piiqb.com/2bfb/2258.htmlty.zvebh.com/4767/2249.htmlty.ykejy.com/491f/2253.htmlty.afxob.com/d248/2298.htmlty.oonbc.com/677c/2258.htmlty.ewzbz.com/cf8a/2293.htmlty.mvyfh.com/fb83/2267.htmlty.yvbpw.com/540d/2260.htmlty.jcpki.com/d896/2270.htmlty.guezm.com/2010/2279.htmlty.zfbcv.com/2ef7/2257.htmlty.fyifl.com/8c86/2275.htmlty.odosz.com/32f8/2272.htmlty.kfxwe.com/9ce0/2276.htmlty.onvqr.com/c0b6/2263.htmlty.uzkux.com/178e/2261.htmlty.wejyr.com/45b4/2259.htmlty.rnnjp.com/cf9d/2262.htmlty.wvnrd.com/9405/2258.htmlty.hobfv.com/9f9e/2269.htmlty.drcax.com/10c2/2293.htmlty.buekh.com/650d/2289.htmlty.ppdlo.com/a023/2260.htmlty.gngju.com/4f51/2275.htmlty.siohi.com/462e/2260.htmlty.ujwak.com/7ed7/2256.htmlty.ofuax.com/d7a0/2273.htmlty.uqrtk.com/4588/2257.htmlty.inbvu.com/49ab/2271.htmlty.dwxbi.com/6ba6/2291.htmlty.lujko.com/2f27/2271.htmlty.eaqsw.com/97d7/2282.htmlty.sqruu.com/483d/2257.htmlty.pvoxi.com/fcf6/2266.htmlty.nrdka.com/f474/2261.htmlty.usmfq.com/63a0/2261.htmlty.fkfrl.com/2c4d/2288.htmlty.wgecu.com/ede9/2264.htmlty.qbtge.com/080e/2259.htmlty.rvftm.com/0d84/2256.htmlty.oywog.com/ff40/2264.htmlty.fvuvm.com/f57f/2273.htmlty.ungce.com/f01f/2260.htmlty.ppdlo.com/2254/2261.htmlty.hosjb.com/f5bb/2292.htmlty.aajvc.com/102a/2284.htmlty.utmku.com/061e/2257.htmlty.vwqwc.com/7353/2253.htmlty.uykxn.com/51ce/2260.htmlty.meklw.com/8584/2271.htmlty.pkehs.com/872c/2273.htmlty.xesiy.com/4d01/2259.htmlty.qjkrs.com/f5cb/2258.htmlty.kgvji.com/b211/2274.htmlty.ejaiy.com/2500/2288.htmlty.piiqb.com/4212/2259.htmlty.dyotb.com/837b/2293.htmlty.kwlnp.com/b4b0/2280.htmlty.uprhr.com/07ab/2251.htmlty.xlozs.com/e218/2255.htmlty.oxjcy.com/4ac6/2267.htmlty.pnfqe.com/0bc5/2263.htmlty.njfua.com/c38f/2264.htmlty.ykiqx.com/61e1/2248.htmlty.jetyv.com/236e/2270.htmlty.ofuax.com/5b02/2274.htmlty.gngju.com/0372/2276.htmlty.hxves.com/61e9/2285.htmlty.feemt.com/dfb0/2287.htmlty.ifvwu.com/bb89/2275.htmlty.omnjg.com/e4d3/2271.htmlty.ycvuv.com/d175/2252.htmlty.kabjb.com/248a/2272.htmlty.vakbl.com/3860/2258.htmlty.eflra.com/e2b2/2296.htmlty.igxis.com/b613/2277.htmlty.mdqlo.com/0902/2265.htmlty.stkio.com/f3b0/2258.htmlty.vyngl.com/64f4/2252.htmlty.inhbp.com/68e3/2286.htmlty.ecxwj.com/5701/2295.htmlty.ekbkq.com/d0c7/2290.htmlty.doywp.com/fa74/2287.htmlty.wikxu.com/f378/2250.htmlty.ykiqx.com/b4ac/2249.htmlty.werzk.com/52d2/2257.htmlty.ijqqb.com/44db/2274.htmlty.sgixh.com/ac1d/2259.htmlty.yuhoa.com/ece5/2259.htmlty.vuviz.com/80d1/2258.htmlty.xwmha.com/a739/2250.htmlty.njfua.com/4aaf/2265.htmlty.djrri.com/50c3/2287.htmlty.kjcbo.com/c479/2264.htmlty.yxnou.com/0088/2250.htmlty.cnsaq.com/1766/2283.html 侧面长方形的长底面周长 圆柱的侧面展开是一个长方形. 1、有两个底面：2、一个侧面：面积相等宽长高长=底面周长 底面底面底面的周长底面底面底面的周长高高 圆柱的侧面积＝底面周长×高长方形的长＝圆柱的底面周长，长方形的宽＝圆柱的高。底面底面底面的周长高S侧=Ch 圆柱的表面由上、下两个底面和一个侧面组成。圆柱的表面积＝侧面积＋两个底面的面积 3030101010101023.14××(1)侧面积：2×3.14×10×30=1884(平方厘米)(2)底面积：3.14×102=314(平方厘米)(3)表面积：1884+314×2=2512(平方厘米) 做一个无盖的圆柱形铁皮水桶，高是5分米。底面直径4分米，至少需要多大面积的铁皮?水桶没有盖，说明它只有一个底面。(1)水桶的侧面积：3.14×4×5=62.8(平方分米)(2)水桶的底面积：3.14×(4÷2)2=12.56(平方分米)(3)需要铁皮：62.8+12.56=75.36(平方分米) 在解答实际问题前一定要先进行分析，看它们求的是哪部分面积，再选择解答的方法。 努力吧！ 12161518205计算下现各圆柱的表面积。（单位：厘米） B选一选A：6B：12C：24一个圆柱形木棒，底面半径2厘米，高3厘米，沿底面直径纵剖后，表面积之和增加（）平方厘米。 一台压路机的滚筒宽1.2米，直径为0.8米。如果它滚动10周，压路的面积是多少平方米？ 如果一段圆柱形的木头，截成两截，它的表面积会有什么变化呢？ '