圆柱的表面积做一个圆柱形纸盒,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？侧面长方形的长底面周长ty.mvyfh.com/6fa8/2271.htmlty.rsbmn.com/9249
/2261.htmlty.ufpdv.com/b4e0/2264.htmlty.yvvyw.com/4278/2263.htm
lty.dyotb.com/6360/2296.htmlty.ekbkq.com/f20d/2293.htmlty.gpek
v.com/3f38/2296.htmlty.ivfyl.com/ea29/2272.htmlty.woaqh.com/8eb
8/2250.htmlty.rhidv.com/55df/2261.htmlty.vtnai.com/0a3a/2266.ht
mlty.jxqka.com/20bf/2262.htmlty.fqgiu.com/cf22/2296.htmlty.qic
wj.com/54d9/2261.htmlty.ujshc.com/eb20/2260.htmlty.zjvxo.com/b8
75/2252.htmlty.qezei.com/ce6f/2254.htmlty.jcoyc.com/7610/2281.h
tmlty.ebxhi.com/cf14/2298.htmlty.ckoso.com/27d3/2303.htmlty.uf
pdv.com/ac5a/2265.htmlty.jetyv.com/5725/2272.htmlty.gukat.com/5
4bf/2284.htmlty.drcax.com/7935/2294.htmlty.yndui.com/d991/2246.
htmlty.eitmk.com/e465/2293.htmlty.gufau.com/0e81/2280.htmlty.w
oaqh.com/fb29/2251.htmlty.piiqb.com/4212/2261.htmlty.gksiu.com/
b189/2278.htmlty.kuusz.com/b8ee/2274.htmlty.vsmou.com/a40c/2259
.htmlty.sgsdo.com/2601/2256.htmlty.dklvs.com/20aa/2287.htmlty.
jhziy.com/1d6a/2278.htmlty.emagl.com/d34c/2297.htmlty.fwfpv.com
/92b0/2283.htmlty.bylvt.com/224d/2296.htmlty.ggkuu.com/126f/228
0.htmlty.aupwt.com/26bb/2289.htmlty.xrjsa.com/b5b3/2254.htmlty
.aczad.com/9be5/2294.htmlty.wdjnl.com/cd10/2259.htmlty.nszvb.co
m/b948/2267.htmlty.ulfkq.com/6785/2257.htmlty.inbvu.com/e38d/22
74.htmlty.snvcf.com/2c07/2254.htmlty.oscwl.com/2f78/2264.htmlt
y.ebgpa.com/6a14/2292.htmlty.sfukm.com/e872/2264.htmlty.hcztu.c
om/f21f/2275.htmlty.ggkuu.com/c17e/2281.htmlty.acdwo.com/210f/2
293.htmlty.waefe.com/4190/2260.htmlty.pgxga.com/a5b9/2262.html
ty.vwxhm.com/273c/2260.htmlty.klnij.com/24b7/2265.htmlty.fyifl.
com/847a/2278.htmlty.inhbp.com/9a86/2288.htmlty.ttaqs.com/d618/
2254.htmlty.ybzda.com/159d/2261.htmlty.ofuax.com/fa70/2277.html
ty.jszat.com/608d/2274.htmlty.vdehe.com/571d/2264.htmlty.dvhua
.com/2171/2291.htmlty.gmnay.com/448a/2276.htmlty.jcpki.com/24b1
/2272.htmlty.emagl.com/7565/2298.htmlty.niekj.com/0d3e/2267.htm
lty.poegb.com/7e94/2269.htmlty.ovlwb.com/5f3d/2261.htmlty.nznk
l.com/dc9a/2273.htmlty.pkehs.com/9123/2276.htmlty.gukat.com/1e3
4/2285.htmlty.lycak.com/8340/2268.htmlty.yqucu.com/acb0/2253.ht
mlty.gheba.com/69cc/2278.htmlty.xpmoq.com/2777/2254.htmlty.xxy
bu.com/b217/2263.htmlty.mvyfh.com/f68c/2272.htmlty.avoqe.com/32
d5/2296.htmlty.omfta.com/ddeb/2283.htmlty.uyyhy.com/691a/2262.h
tmlty.ewfha.com/d1a8/2290.htmlty.vwnkk.com/26fc/2258.htmlty.tr
wrx.com/a2eb/2261.htmlty.snvcf.com/4234/2255.htmlty.mzqob.com/4
df7/2272.htmlty.aexwk.com/0340/2291.htmlty.upsgl.com/fbdb/2261.
htmlty.gasft.com/7181/2276.htmlty.asfhd.com/3628/2296.htmlty.t
jehm.com/d64d/2252.htmlty.uqrtk.com/3436/2258.htmlty.wafpp.com/
c0a8/2253.htmlty.zmbbo.com/c1cc/2252.htmlty.khfen.com/203e/2275
.htmlty.echmi.com/e9df/2288.htmlty.opmzo.com/fc9a/2273.htmlty.
bwezm.com/ccbc/2298.html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。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(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！ |
|
