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20\u8d5e\u00b7183,181\u6d4f\u89c82019-10-24
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\u6839\u636e\u6587\u4e2d\u63d0\u5230\u7684\u5706\u9525\u4e3a\u60a8\u63a8\u8350
\u5b81\u6ce2\u96c5\u5b66\u6559\u80b2\u6709\u9650\u516c\u53f8\u5e7f\u544a
\u521d\u4e09\u6570\u5b66\u5706\u5706\u9525\u7684\u4fa7\u9762\u79ef\u548c\u5168\u9762\u79ef
\u6839\u636e\u6587\u4e2d\u63d0\u5230\u7684\u5706\u9525\u4e3a\u60a8\u63a8\u8350
\u6df1\u5733\u524d\u6d77\u65b0\u4e4b\u6c5f\u4fe1\u606f..\u5e7f\u544a
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6
\u4e0b\u4e00\u6761\u56de\u7b54
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\u8bbe\uff1a\u5706\u9525\u5e95\u9762\u7684\u534a\u5f84OB\u957f\u4e3aR\uff0c\u5706\u9525\u7684\u6bcd\u7ebf\u4e5f\u5373\u6247\u5f62\u7684\u534a\u5f84AB\u957f\u4e3aL\uff0c
\u5219 \u6247\u5f62\u7684\u5f27\u957fB\u2312C=\u5e95\u9762\u7684\u5706\u5468\u957f2\u03c0R\uff0c \u6247\u5f62\u7684\u9762\u79ef=1/2x\u5f27\u957fx\u534a\u5f84=1/2(2\u03c0R)L=\u03c0RL,
\u4e5f\u5373 \u5706\u9525\u7684\u4fa7\u9762\u79ef=\u03c0RL\u3002
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..........................................................................................................................................................................................................................................................................................
\u89e3\uff1a\u5706\u9525\u7684\u4fa7\u9762\u5c55\u5f00\u662f\u4e00\u4e2a\u6247\u5f62\uff0c\u5982\u4e0b\u56fe\u6247\u5f62ABC\uff0c\u5219\u5706\u9525\u7684\u4fa7\u9762\u79ef=\u6247\u5f62\u7684\u9762\u79ef\u3002
\u8bbe\uff1a\u5706\u9525\u5e95\u9762\u7684\u534a\u5f84OB\u957f\u4e3aR\uff0c\u5706\u9525\u7684\u6bcd\u7ebf\u4e5f\u5373\u6247\u5f62\u7684\u534a\u5f84AB\u957f\u4e3aL\uff0c
\u5219 \u6247\u5f62\u7684\u5f27\u957fB\u2312C=\u5e95\u9762\u7684\u5706\u5468\u957f2\u03c0R\uff0c \u6247\u5f62\u7684\u9762\u79ef=1/2x\u5f27\u957fx\u534a\u5f84=1/2(2\u03c0R)L=\u03c0RL,
\u4e5f\u5373 \u5706\u9525\u7684\u4fa7\u9762\u79ef=\u03c0RL\u3002
小学一到六年级数学知识点总结：
小学一年级：九九乘法口诀表，学会基础加减乘：背诵好九九乘法口诀表，做到熟悉个位数的相乘；
小学二年级：完善乘法口诀表，牢固一年级知识，学会除混合运算，基础几何图形；
小学三年级：学会乘法交换律，几何面积周长等，时间量及单位。路程计算，分配律，分数小数；
小学四年级：线角自然数整数，素因数梯形对称，分数小数计算；
小学五年级：分数小数乘除法，代数方程及平均，比较大小变换，图形面积体积；
小学六年级：比例百分比概率，圆扇圆柱及圆锥。
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绛旓細琛ㄩ潰绉=搴曢潰绉+渚ч潰绉 =蟺路r²+½路2蟺r路l =蟺路r²+蟺rl =蟺r路(l+r)鍦嗛敟鐨勮〃闈㈢Н鍏紡鎺ㄥ杩囩▼ 濡傛灉鐢╮鏉ヨ〃绀哄簳闈㈠崐寰勶紝l琛ㄧず鍦嗛敟鐨勬瘝绾匡紝n掳琛ㄧず鍦嗛敟渚ч潰鎵囧舰鐨勫渾蹇冭鐨勫害鏁帮紝鍒欏簳闈㈠懆闀夸负2蟺r,鎵浠ユ墖褰㈢殑寮х嚎闀垮害涔熶负2蟺r;鑰屽姬绾块暱搴(鎵囧舰鎵鍗犲渾鍛ㄩ暱)灏辩瓑浜巒掳/36...
绛旓細鍦嗛敟鐨勬墍鏈夊叕寮1銆丼琛ㄩ潰绉紳蟺r^2+蟺rR锛坮鏄簳闈㈠崐寰锛孯鏄瘝绾匡級2銆丼渚ч潰绉紳蟺rR锛坮鏄簳闈㈠崐寰勶紝R鏄瘝绾匡級3銆乂浣撻潰绉紳1/3Sh锛圫鏄簳闈㈢Н锛宧鏄渾閿ラ珮锛夊姬闀匡細n蟺R/180鎵囪闈㈢Н锛歯蟺R^2/360
绛旓細鍦嗛敟浣撶殑琛ㄩ潰绉叕寮忔槸锛歋=蟺r²+蟺rl銆傚渾閿ヤ晶闈㈠睍寮鍥維渚=蟺rl=锛坣蟺l^2锛/360銆俽=鍗婂緞锛宭=姣嶇嚎锛屜锛濆渾鍛ㄧ巼銆傝〃闈㈢Н锛濆簳闈㈢Н锛嬩晶闈㈢Н銆傦紳蟺路r²+½路2蟺r路l 锛澫路r²+蟺rl 锛澫r路锛坙+r锛夊渾閿ヤ綋鐨勮〃闈㈢Н鎺ㄥ锛歋琛紳S渚э紜S搴曪紳蟺脳r脳r+蟺脳r脳L=蟺r...
绛旓細鍦嗛敟琛ㄩ潰绉殑璁＄畻鍏紡鏄細鍦嗛敟鐨勮〃闈㈢Н锛濆簳闈㈢Н锛嬩晶闈㈢Н锛堜晶闈㈢Н灏嗗渾閿ョ殑渚ч潰绉笉鎴愭洸绾垮湴灞曞紑锛屾槸涓涓墖褰傦級锛岀敤瀛楁瘝琛ㄧず灏辨槸S=蟺r2+蟺rl锛堝叾涓璴=姣嶇嚎锛屾槸鍦嗛敟鐨勯《鐐瑰埌鍦嗛敟鐨勫簳闈㈠渾鍛ㄤ箣闂寸殑璺濈锛夈傛墖褰㈠姬闀縇=鍦嗗績瑙掞紙寮у害鍒讹級脳R=n蟺R/180锛埼镐负鍦嗗績瑙掞級锛圧涓烘墖褰㈠崐寰勶級鎵囧舰闈㈢НS=n蟺R2/...
绛旓細鍦嗛敟鐨勮〃闈㈢Н鍏紡鏄細S=蟺r²+蟺rl锛涘渾閿ョ殑浣撶Н鍏紡鏄細V=1/3蟺r²h12銆1銆佸渾閿ョ殑琛ㄩ潰绉=鍦嗗懆鐜嚸楁瘝绾块暱脳搴曢潰鍗婂緞+鍦嗗懆鐜嚸楀簳闈㈠崐寰劽楀簳闈㈠崐寰勶紱鍦嗛敟鐨勪綋绉=1/3脳鍦嗗懆鐜嚸楀簳闈㈢Н脳楂橈紝鍦嗛敟浣撶殑浣撶Н鏄笌瀹冪瓑搴曠瓑楂樼殑鍦嗘煴浣撲綋绉殑涓夊垎涔嬩竴銆傚渾閿ョ殑搴曢潰鍛ㄩ暱灏辨槸鍏朵晶闈㈠睍寮鍥炬墖褰㈢殑...
绛旓細鍗充负鍦嗛敟鐨勮〃闈㈢Н銆傚浜庡渾閿ョ殑浣撶Н璁＄畻锛屾垜浠彲浠ュ埄鐢ㄤ互涓嬪叕寮忥細V = (1/3)蟺r^2h銆傝繖涓叕寮忔槸鍩轰簬鍦嗘煴鐨勪綋绉鍏紡鎺ㄥ鑰屾潵锛屽渾鏌卞彲浠ョ湅浣滄槸涓涓渾閿ョ殑搴曢潰涓嶆柇寤堕暱鑰屾垚鐨勩傛垜浠彲浠ュ皢鍦嗛敟鐪嬩綔鏄竴涓敱鏃犵┓涓杽鍦嗘煴浣撶粍鎴愮殑浣撶Н锛岀劧鍚庡姣忎釜鍦嗘煴浣撶殑浣撶Н杩涜姹傚拰锛屽嵆鍙緱鍒板渾閿ョ殑浣撶Н銆
绛旓細鍦嗛敟鐨勮〃闈㈢Н鍏紡涓猴細S = 蟺rl + 蟺r²锛屽叾涓璻涓哄簳闈㈠渾鐨勫崐寰勶紝l涓哄渾閿ョ殑鏂滈珮銆傛帴涓嬫潵璇︾粏瑙ｉ噴杩欎釜鍏紡锛氬渾閿ョ殑琛ㄩ潰绉敱涓ら儴鍒嗙粍鎴愶細搴曢潰鐨勫渾闈㈢Н鍜屼晶闈㈢殑闈㈢Н銆1. 搴曢潰鍦嗛潰绉殑璁＄畻鍏紡涓合r²锛屽叾涓璻鏄簳闈㈠渾鐨勫崐寰勩傝繖鏄竴涓熀鏈殑鍦嗛潰绉绠楀叕寮忋2. 渚ч潰鏄竴涓洸闈紝鎴戜滑鍙互...
绛旓細鍦嗛敟琛ㄩ潰绉殑鍏紡鏄細S = 蟺r銆傚叾涓紝r浠ｈ〃搴曢潰鍦嗙殑鍗婂緞锛宭浠ｈ〃鍦嗛敟鐨勬枩楂樸鍦嗛敟鐨勮〃闈㈢Н鏄敱涓涓簳闈㈠渾鍜屼竴涓晶闈㈢粍鎴愩傚簳闈㈡槸涓涓渾褰紝鍏闈㈢Н鍏紡涓合r²銆備晶闈㈢殑褰㈢姸鏄竴涓洸闈紝鍙互杩戜技鐪嬩綔鏄竴涓墖褰㈠洿缁曞渾閿ョ殑杞寸嚎鏃嬭浆褰㈡垚鐨勩傝绠椾晶闈㈤潰绉椂锛岄渶瑕佷娇鐢ㄥ埌鍦嗛敟鐨勬枩楂榣銆備晶闈㈤潰绉殑璁＄畻...
绛旓細鍦嗛敟鍦嗘煴鐨勮绠楀叕寮 鍦嗘煴鐨勪晶闈㈢Н=搴曢潰鍛ㄩ暱*楂 鍦嗘煴鐨勮〃闈㈢Н=渚ч潰绉+搴曢潰绉*2 鍦嗘煴鐨勪綋绉=搴曢潰绉*楂 鍦嗛敟鐨勪晶闈㈢Н=楂樼殑骞虫柟*3.14*鐧惧垎涔嬫墖褰㈢殑搴︽暟 鍦嗛敟鐨勮〃闈㈢Н=搴曢潰绉+渚ч潰绉 鍦嗛敟鐨勪綋绉=1/3*搴曢潰绉*楂 S渚=CH S琛=S渚+2S搴 V鏌=SH S閿ヤ晶=H鐨勫钩鏂*3.14*鐧惧垎涔嬫墖褰㈢殑搴︽暟 S閿ヨ〃...
