圆的所有公式
\u5706\u7684\u6240\u6709\u516c\u5f0f\u5468\u957f\uff1aC=2\u03c0r \uff08r\u534a\u5f84\uff09
\u9762\u79ef\uff1aS=\u03c0r²
\u534a\u5706\u5468\u957f\uff1aC=\u03c0r+2r
\u534a\u5706\u9762\u79ef\uff1aS=\u03c0r²/2
\u6269\u5c55\u8d44\u6599\uff1a
\u5706\u5f62\u9762\u79ef
\u7f16\u8f91
\u5706\u7684\u534a\u5f84\uff1ar
\u76f4\u5f84\uff1ad
\u5706\u5468\u7387\uff1a\u03c0\uff08\u6570\u503c\u4e3a3.1415926\u81f33.1415927\u4e4b\u95f4\u2026\u2026\u65e0\u9650\u4e0d\u5faa\u73af\u5c0f\u6570\uff09\uff0c\u901a\u5e38\u91c7\u75283.14\u4f5c\u4e3a\u03c0\u7684\u6570\u503c
\u5706\u9762\u79ef\uff1a
\u5706\u9762\u79ef=\u5706\u5468\u7387\u00d7\u534a\u5f84\u00d7\u534a\u5f84
\u534a\u5706\u7684\u9762\u79ef\uff1aS\u534a\u5706=(\u03c0r2)\u00f72
\u534a\u5706\u7684\u9762\u79ef=\u5706\u5468\u7387\u00d7\u534a\u5f84\u00d7\u534a\u5f84\u00f72
\u5706\u73af\u9762\u79ef\uff1a S\u5927\u5706\uff0dS\u5c0f\u5706=\u03c0(R2-r2)\uff08R\u4e3a\u5927\u5706\u534a\u5f84\uff0cr\u4e3a\u5c0f\u5706\u534a\u5f84\uff09
\u5706\u73af\u9762\u79ef=\u5916\u5927\u5706\u9762\u79ef\uff0d\u5185\u5c0f\u5706\u9762\u79ef
\u5706\u7684\u5468\u957f\uff1a
\u6216
\u5706\u7684\u5468\u957f=\u76f4\u5f84\u00d7\u5706\u5468\u7387
\u534a\u5706\u7684\u5468\u957f\uff1a
\u6216\u8005
\u534a\u5706\u5468\u957f=\u5706\u5468\u7387\u00d7\u534a\u5f84+\u76f4\u5f84
圆的面积S=πr²
标准方程（x-a）²+（y-b）²=r²
一般方程x²+y²+Dx+Ey+F=0 配方（x+D/2)²+(y+E/2)²=D+E-4F/4 圆心（—D/2,—E/2)半经 根号下D²+E²-4F/2
直径圆 以（x1,y1)（x2,y2）为直径 （x-x1)（x-x2)+（y-y1)(y-y2)=0
共点圆：O1+nO2=0
1.圆的周长C=2πr=πd
2.圆的面积S=πr²
3.扇形弧长l=nπr/180
4.扇形面积S=nπr²/360=rl/2
5.圆锥侧面积S=πrl
2r半径=R直径.面积=派r方，周长=派R=r2派
绛旓細鍦嗙殑鎵鏈夊叕寮忓涓嬶細鍦嗙殑鍛ㄩ暱锛欳=2蟺r鎴朿=蟺d銆傚渾鐨勯潰绉細s=蟺R²锛坰鏄潰绉紝蟺鏄渾鍛ㄧ巼鈮3.14锛孯²鏄崐寰勭殑骞虫柟锛夈傚崐鍦嗙殑鍛ㄩ暱锛歞+(蟺d)/2鎴栬卍+蟺r銆傚崐鍦嗙殑闈㈢Н锛歋鍗婂渾=(蟺r^2;)/2銆傚渾鐜潰绉細 S澶у渾-S灏忓渾=蟺(R^2-r^2) (R涓哄ぇ鍦嗗崐寰勶紝r涓哄皬鍦嗗崐寰)銆傛帹瀵艰繃绋嬶細...
绛旓細浜.鍛ㄩ暱鍏紡锛氬渾鐨勫懆闀匡細C=2蟺r鎴朇=蟺d銆備笁.鍦嗙殑鏂圭▼锛1銆佸渾鐨勬爣鍑嗘柟绋嬶細鍦ㄥ钩闈㈢洿瑙掑潗鏍囩郴涓紝浠ョ偣O锛坅锛宐锛変负鍦嗗績锛屼互r涓哄崐寰勭殑鍦嗙殑鏍囧噯鏂圭▼鏄紙x-a锛塣2+锛坹-b锛塣2=r^2銆傜壒鍒湴锛屼互鍘熺偣涓哄渾蹇冿紝鍗婂緞涓簉锛坮>0锛夌殑鍦嗙殑鏍囧噯鏂圭▼涓簒^2+y^2=r^2銆2銆佸渾鐨勪竴鑸柟绋嬶細鏂圭▼x^2+y^...
绛旓細涓銆鍛ㄩ暱鍏紡 1銆佸渾鐨勫懆闀匡細C=2蟺r锛坮锛氬崐寰勶級2銆佸崐鍦嗗懆闀匡細C=蟺r+2r 浜屻佸渾鐨勯潰绉 1銆侀潰绉細S=蟺r²2銆佸崐鍦嗛潰绉細S=蟺r²/2 涓夈佸姬闀胯搴﹀叕寮 1銆佹墖褰㈠姬闀匡細L=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2銆佹墖褰㈤潰绉細S=n蟺R²/360=LR/2锛...
绛旓細鍦嗗叕寮忓叏閮細1銆佸渾闈㈢Н锛歋=蟺r锛孲=蟺(d/2)锛坉涓虹洿寰勶紝r涓哄崐寰勶級銆2銆佸崐鍦嗙殑闈㈢Н锛歋鍗婂渾=(蟺r^2)/2銆3銆佸渾鐨勫懆闀匡細C=2蟺r鎴朿=蟺d銆4銆佸崐鍦嗙殑鍛ㄩ暱锛歞+(蟺d)/2鎴栬卍+蟺r銆5銆佹墖褰㈡墍鍦ㄥ渾鐨勯潰绉櫎浠360鍐嶄箻浠ユ墖褰㈠渾蹇冭鐨勮搴锛歋=n/360脳蟺r銆傛ц川锛氬湪涓涓钩闈㈠唴锛屽洿缁曚竴涓偣骞...
绛旓細鍦嗙殑鎵鏈夊叕寮忥細涓銆佸懆闀垮叕寮忥細1銆佸渾鐨勫懆闀匡細C=2蟺r锛坮锛氬崐寰勶級銆2銆佸崐鍦嗗懆闀匡細C=蟺r+2r銆備簩銆佸渾鐨勯潰绉細1銆侀潰绉細S=蟺r²銆2銆佸崐鍦嗛潰绉細S=蟺r²/2銆備笁銆佸姬闀胯搴﹀叕寮忥細鎵囧舰寮ч暱L=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崐寰勶級銆傛墖褰㈤潰绉疭=n蟺R²/...
绛旓細1銆佸渾鐨鍛ㄩ暱鍏紡锛欳=2蟺r 锛坮鍗婂緞锛2銆佸渾鐨勯潰绉叕寮忥細S=蟺r 3銆佸崐鍦嗙殑鍛ㄩ暱鍏紡锛欳=蟺r+2r 4銆佸崐鍦嗙殑闈㈢Н鍏紡锛歋=蟺r/2 5銆佸渾鐨勬爣鍑嗘柟绋嬶細鍦ㄥ钩闈㈢洿瑙掑潗鏍囩郴涓紝浠ョ偣O锛坅,b锛変负鍦嗗績锛屼互r涓哄崐寰勭殑鍦嗙殑鏍囧噯鏂圭▼鏄紙x-a锛塣2+锛坹-b锛塣2=r^2 6銆佸渾鐨勪竴鑸柟绋嬶細鎶婂渾鐨勬爣鍑嗘柟绋嬪睍寮,...
绛旓細鍦嗙殑鍛ㄩ暱锛濆渾鍛ㄧ巼脳鐩村緞鍏紡锛歝=蟺d =2蟺r 鍦嗙殑闈㈢Н锛濆崐寰劽楀崐寰劽椣鍏紡锛歋=蟺rr 鍗婂渾鍛ㄩ暱锛滳=蟺r+2r 鍗婂渾闈㈢Н锛漇=蟺r²/2 鍦嗙殑瀹氱悊 1銆佸渾蹇冭瀹氱悊锛氬湪鍚屽渾鎴栫瓑鍦嗕腑锛岀浉绛夌殑鍦嗗績瑙掓墍瀵瑰姬鐩哥瓑锛屾墍瀵圭殑寮︾浉绛夛紝鎵瀵圭殑寮︾殑寮﹀績璺濈浉绛夈2銆佸渾鍛ㄨ瀹氱悊锛氫竴鏉″姬鎵瀵圭殑鍦嗗懆瑙掔瓑浜庡畠鎵...
绛旓細1銆佸渾鐨鍛ㄩ暱鍏紡C=2蟺r銆傝繖涓叕寮忚〃绀哄渾鐨勫懆闀跨瓑浜2蟺涔樹互鍗婂緞銆傚叾涓鏄竴涓父鏁帮紝绾︾瓑浜3.14159銆傝繖涓叕寮忓湪璁＄畻鍦嗙殑鍛ㄩ暱鎴栬呭渾鐨勫懆闀夸笌鐩村緞鐨勬瘮渚嬫椂闈炲父鏈夌敤銆2銆佸渾鐨勯潰绉叕寮廇=蟺r²銆傝繖涓叕寮忚〃绀哄渾鐨勯潰绉瓑浜幭涔樹互鍗婂緞鐨勫钩鏂广傝繖涓叕寮忓湪璁＄畻鍦嗙殑闈㈢Н鎴栬呭渾鐨勯潰绉笌鍗婂緞鐨勫叧绯绘椂闈炲父鏈夌敤...
绛旓細鍦嗙殑鍛ㄩ暱锛 c=2蟺r=蟺d 鍗婂渾鐨勫懆闀匡細c=蟺r+2r 鍦嗛潰绉細S=蟺r²鍗婂渾鐨勯潰绉細S=(蟺r²)梅2 鍦嗙幆闈㈢Н锛 S澶у渾锛峉灏忓渾=蟺(R²-r²)锛圧澶у渾鍗婂緞锛夊崐鍦嗗懆闀=蟺脳r+d 娉細鍦嗙殑鍗婂緞锛歳 鐩村緞锛歞 鍦嗗懆鐜囷細蟺锛3.1415926鈥︹︼級...
绛旓細1銆佹眰鍦嗙殑鍛ㄩ暱锛鍏紡涓猴細C=2蟺r鎴朇=蟺d銆2銆佹眰鍦嗙殑闈㈢Н锛屽叕寮忎负锛歋=2蟺r銆3銆佹眰鍦嗙殑鍗婂緞锛屽叕寮忎负锛歳=d梅2鎴杛=C梅2蟺鎴杛=鈭歋梅蟺銆4銆佹眰鍦嗙殑鐩村緞锛屽叕寮忎负锛歞=2r鎴杁=C梅蟺銆傚渾鍛ㄧ巼 鍦嗗懆鐜囩敤甯岃厞瀛楁瘝蟺锛堣浣滐蓟paɪ锛斤級琛ㄧず锛屾槸涓涓父鏁帮紙绾︾瓑浜3.141592654锛夛紝鏄唬琛ㄥ渾鍛ㄩ暱...
