一个圆柱底面半径三厘米里面直径六厘米高五厘米底面积 一个圆柱底面积直径为六厘米若高减去三厘米则表面积减去多少厘米...
\u4e00\u4e2a\u5706\u67f1\u7684\u5e95\u9762\uff0c\u5e95\u9762\u534a\u5f84\uff0c\u662f\u4e09\u5398\u7c73\u9ad8\u662f\u4e94\u5398\u7c73\u8fd9\u4e2a\u5706\u67f1\u7684\u8868\u9762\u79ef\u662f\u591a\u5c11\uff1f\u8fd9\u4e2a\u5706\u67f1\u7684\u8868\u9762\u79ef\u662f
3x3x3.14x2+2x3x3.14x5
=18x3.14+30x3.14
=48x3.14
=150.72 \u5e73\u65b9\u5398\u7c73
\u5706\u67f1\u7684\u5e95\u9762\u5468\u957f
C=\u03c0d=3.14\u00d76\u5398\u7c73=18.84\u5398\u7c73
\u51cf\u5c11\u7684\u8868\u9762\u79ef\u5c31\u662f\u51cf\u6389\u7684\u90a3\u90e8\u5206\u7684\u4fa7\u9762\u79ef
S=C\u00d7h
=18.84\u5398\u7c73\u00d73\u5398\u7c73=56.52\u5398\u7c73²
底面积是 3.14×3²=28.26(平方厘米)
绛旓細鍦嗘煴鐨勫簳闈㈡槸涓渾锛屾牴鎹渾鐨勯潰绉绠楋紝宸茬煡鍗婂緞涓夊帢绫冲叕寮忔槸s锛濆厐r鐨勫钩鏂癸紝鎵浠3.14X3鐨勫钩鏂=28.26
绛旓細涓涓簳闈㈠崐寰勬槸3鍘樼背楂8鍘樼背鐨鍦嗘煴浣撴部鐩村緞鍒囨垚鍗婂渾鏌变綋锛屽叾琛ㄩ潰绉鍔犱簡澶氬皯骞虫柟鍘樼背锛堜綘涓瀹氭槸闂敊浜嗭紝鍥犱负鏃犺鎬庝箞鍒囦綋绉槸娌℃湁鍙樺寲鐨勶級銆傚垏寮鐨勬柊澧為潰绉槸涓や釜闀挎柟褰 闀垮氨鏄師鏉ョ殑楂8鍘樼背锛屽鏄簳鍦嗙洿寰2脳3=6鍘樼背锛屾墍浠ユ柊澧為潰绉槸 8脳6脳2=96鍘樼背²...
绛旓細h姘=V閿ッ稴鏌=18蟺梅[蟺脳(18/2)^2]=2/9鈮0.22鍘樼背
绛旓細鍦嗘煴褰㈠鍣ㄧ殑搴曢潰绉細3.14脳锛18梅2锛²=254.34锛堛帩²锛夊渾閿ラ搧鍧楃殑搴曢潰绉細3.14脳3²=28.26锛堛帩²锛夊渾閿ラ搧鍧楃殑浣撶Н锛28.26脳6梅3=56.52锛堛帩³锛夋按闈細涓婂崌鐨勯珮搴︼細56.52梅254.34鈮0.2锛堛帩锛夌瓟锛氭按闈細涓婂崌绾0.2銕濄
绛旓細澧炲姞鐨勯潰绉氨鏄2涓暱鏄4鍘樼背锛屽鏄3鍘樼背鐨勯暱鏂瑰舰鐨勯潰绉紝鍗筹細4脳3脳2=24锛堝钩鏂瑰帢绫筹級锛庣瓟锛氳〃闈㈢Н澧炲姞浜24骞虫柟鍘樼背锛庢晠閫夛細C锛
绛旓細闀挎柟浣撶殑瀹藉害 = 鍦嗘煴褰㈠簳闈鐩村緞 = 2 脳 鍦嗘煴褰搴曢潰鍗婂緞 = 2 脳 3鍘樼背 = 6鍘樼背 闀挎柟浣撶殑楂樺害 = 鍦嗘煴褰㈤珮搴 = 4鍘樼背 瀹圭Н璁＄畻鍏紡涓猴細瀹圭Н = 闀垮害 脳 瀹藉害 脳 楂樺害 灏嗕笂杩板间唬鍏ヨ绠楋細瀹圭Н = 6鍘樼背 脳 6鍘樼背 脳 4鍘樼背 = 144绔嬫柟鍘樼背 鍥犳锛岃繖涓暱鏂逛綋绾哥洅鐨勫绉槸144绔嬫柟鍘樼背銆
绛旓細姣忛儴鍒嗚〃闈㈢Н锛3.14脳3^2+3.14脳3脳2脳5梅2+6脳5=105.36骞虫柟鍘樼背
绛旓細杩欓鏄眰鍦嗙殑闈㈢Н锛屽渾鐨勯潰绉槸鍗婂緞涔樹互鍗婂緞涔3.14锛20鍘樼背涔樹互20鍘樼背涔樹互3.14绛変簬1256骞虫柟鍘樼背
绛旓細2鍒嗙背=20鍘樼背锛 3.14脳锛20梅2锛 2 脳0.3脳3梅锛3.14脳3 2 锛夛紝 =314脳0.9梅28.26锛 =282.6梅28.26锛 =10锛堝帢绫筹級锛 绛旓細鍦嗛敟褰㈤搧鍧楃殑楂樻槸10鍘樼背锛 鍒嗘瀽锛 鏍规嵁棰樺共锛岃繖涓渾閿ュ舰閾佸潡鐨勪綋绉氨鏄笂鍗0.3鍘樼背鐨勬按鐨勪綋绉紝鐢辨鍙互姹傚嚭杩欎釜鍦嗛敟鐨勪綋绉紝鍐嶅埄鐢ㄥ渾閿ョ殑浣撶Н...
绛旓細鍦嗘煴鐨搴曢潰鍗婂緞鏄20梅2锛10锛鍘樼背锛夊渾閿ョ殑浣撶Н锛濅笂鍗囩殑姘寸殑浣撶Н,鏄10脳10脳3.14脳0.3锛94.2锛堢珛鏂瑰帢绫筹級鍦嗛敟鐨勫簳闈㈢Н鏄3脳3脳3.14锛28.26锛堝钩鏂瑰帢绫筹級鍦嗛敟楂樻槸94.2脳3梅28.26锛10锛堝帢绫筹級
