π是什么字母? 1，π是数字，还是字母
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\u03c0\u662f\u6570\u5b57\uff0c\u4e5f\u662f\u5b57\u6bcd\u3002\u662f\u4e00\u4e2a\u5e0c\u814a\u5b57\u6bcd\u3002
\u5706\u5468\u7387\uff08Pi\uff09\u662f\u5706\u7684\u5468\u957f\u4e0e\u76f4\u5f84\u7684\u6bd4\u503c\uff0c\u4e00\u822c\u7528\u5e0c\u814a\u5b57\u6bcd\u03c0\u8868\u793a\uff0c\u662f\u4e00\u4e2a\u5728\u6570\u5b66\u53ca\u7269\u7406\u5b66\u4e2d\u666e\u904d\u5b58\u5728\u7684\u6570\u5b66\u5e38\u6570\u3002\u03c0\u4e5f\u7b49\u4e8e\u5706\u5f62\u4e4b\u9762\u79ef\u4e0e\u534a\u5f84\u5e73\u65b9\u4e4b\u6bd4\u3002\u662f\u7cbe\u786e\u8ba1\u7b97\u5706\u5468\u957f\u3001\u5706\u9762\u79ef\u3001\u7403\u4f53\u79ef\u7b49\u51e0\u4f55\u5f62\u72b6\u7684\u5173\u952e\u503c\u3002 \u5728\u5206\u6790\u5b66\u91cc\uff0c\u03c0\u53ef\u4ee5\u4e25\u683c\u5730\u5b9a\u4e49\u4e3a\u6ee1\u8db3sin x = 0\u7684\u6700\u5c0f\u6b63\u5b9e\u6570x\u3002
\u5706\u5468\u7387\u7528\u5e0c\u814a\u5b57\u6bcd \u03c0\uff08\u8bfb\u4f5cp\u00e0i\uff09\u8868\u793a\uff0c\u662f\u4e00\u4e2a\u5e38\u6570\uff08\u7ea6\u7b49\u4e8e3.141592654\uff09\uff0c\u662f\u4ee3\u8868\u5706\u5468\u957f\u548c\u76f4\u5f84\u7684\u6bd4\u503c\u3002\u5b83\u662f\u4e00\u4e2a\u65e0\u7406\u6570\uff0c\u5373\u65e0\u9650\u4e0d\u5faa\u73af\u5c0f\u6570\u3002
\u5728\u65e5\u5e38\u751f\u6d3b\u4e2d\uff0c\u901a\u5e38\u90fd\u75283.14\u4ee3\u8868\u5706\u5468\u7387\u53bb\u8fdb\u884c\u8fd1\u4f3c\u8ba1\u7b97\u3002\u800c\u7528\u5341\u4f4d\u5c0f\u65703.141592654\u4fbf\u8db3\u4ee5\u5e94\u4ed8\u4e00\u822c\u8ba1\u7b97\u3002\u5373\u4f7f\u662f\u5de5\u7a0b\u5e08\u6216\u7269\u7406\u5b66\u5bb6\u8981\u8fdb\u884c\u8f83\u7cbe\u5bc6\u7684\u8ba1\u7b97\uff0c\u5145\u5176\u91cf\u4e5f\u53ea\u9700\u53d6\u503c\u81f3\u5c0f\u6570\u70b9\u540e\u51e0\u767e\u4e2a\u4f4d\u3002
\u6269\u5c55\u8d44\u6599\uff1a
\u4e0e\u03c0\u76f8\u5173\u7684\u516c\u5f0f\uff1a
1\u3001\u5706\u9762\u79ef\uff1aS=\u03c0r²\uff0cS=\u03c0(d/2)²\u3002\uff08d\u4e3a\u76f4\u5f84\uff0cr\u4e3a\u534a\u5f84\uff09\u3002
2\u3001\u534a\u5706\u7684\u9762\u79ef\uff1aS\u534a\u5706=(\u03c0r^2)/2\u3002\uff08r\u4e3a\u534a\u5f84\uff09\u3002
3\u3001\u5706\u73af\u9762\u79ef\uff1aS\u5927\u5706-S\u5c0f\u5706=\u03c0(R^2-r^2)(R\u4e3a\u5927\u5706\u534a\u5f84\uff0cr\u4e3a\u5c0f\u5706\u534a\u5f84)\u3002
4\u3001\u5706\u7684\u5468\u957f\uff1aC=2\u03c0r\u6216c=\u03c0d\u3002\uff08d\u4e3a\u76f4\u5f84\uff0cr\u4e3a\u534a\u5f84\uff09\u3002
5\u3001\u534a\u5706\u7684\u5468\u957f\uff1ad+(\u03c0d)/2\u6216\u8005d+\u03c0r\u3002\uff08d\u4e3a\u76f4\u5f84\uff0cr\u4e3a\u534a\u5f84\uff09\u3002
\u53c2\u8003\u8d44\u6599\u6765\u6e90\uff1a\u767e\u5ea6\u767e\u79d1-\u5706\u5468\u7387
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绛旓細鍦嗗懆鐜囩敤甯岃厞瀛楁瘝 蟺锛堣浣減脿i锛夎〃绀锛屾槸涓涓父鏁帮紙绾︾瓑浜3.141592654锛夛紝鏄唬琛ㄥ渾鍛ㄩ暱鍜岀洿寰勭殑姣斿笺傚畠鏄竴涓棤鐞嗘暟锛屽嵆鏃犻檺涓嶅惊鐜皬鏁般傚湪鏃ュ父鐢熸椿涓紝閫氬父閮界敤3.14浠ｈ〃鍦嗗懆鐜囧幓杩涜杩戜技璁＄畻銆傁涔熺瓑浜庡渾褰箣闈㈢Н涓庡崐寰勫钩鏂逛箣姣斻傛槸绮剧‘璁＄畻鍦嗗懆闀裤佸渾闈㈢Н銆佺悆浣撶Н绛夊嚑浣曞舰鐘剁殑鍏抽敭鍊笺傚彂闊宠浣溾減...
绛旓細蟺锛堝渾鍛ㄧ巼锛変竴鑸寚鍦嗗懆鐜囷紙鍦嗙殑鍛ㄩ暱涓庣洿寰勭殑姣斿硷級锛岀害绛変簬3.141592654 鍦嗗懆鐜囩敤甯岃厞瀛楁瘝 蟺锛堣浣減脿i锛琛ㄧず锛屾槸涓涓父鏁帮紝鏄唬琛ㄥ渾鍛ㄩ暱鍜岀洿寰勭殑姣斿笺傚畠鏄竴涓棤鐞嗘暟锛屽嵆鏃犻檺涓嶅惊鐜皬鏁般傚湪鏃ュ父鐢熸椿涓紝閫氬父閮界敤3.14浠ｈ〃鍦嗗懆鐜囧幓杩涜杩戜技璁＄畻銆傝岀敤鍗佷綅灏忔暟3.141592654渚胯冻浠ュ簲浠樹竴鑸绠椼傚嵆浣挎槸宸ョ▼...
绛旓細螤锛甯岃厞瀛楁瘝銆傛暟瀛︿腑甯告寚浠鍦嗗懆鐜銆傚渾鍛ㄧ巼锛屼竴鑸互蟺鏉ヨ〃绀猴紝鏄竴涓湪鏁板鍙婄墿鐞嗗鏅亶瀛樺湪鐨勬暟瀛﹀父鏁般傚畠瀹氫箟涓哄渾褰箣鍛ㄩ暱涓庣洿寰勪箣姣斻傚畠涔熺瓑浜庡渾褰箣闈㈢Н涓庡崐寰勫钩鏂逛箣姣斻傛槸绮剧‘璁＄畻鍦嗗懆闀裤佸渾闈㈢Н銆佺悆浣撶Н绛夊嚑浣曞舰鐘剁殑鍏抽敭鍊笺傜敤閫旓細澶у啓瀛楁瘝螤锛氭暟瀛︿腑绉殑绠楀瓙 姹傛荤Н锛岃蟺 灏忓啓瀛楁瘝蟺 蟺鍦ㄥ嚑浣...
绛旓細蟺鏄釜甯岃厞瀛楁瘝锛屽睘浜庣數鑴戦敭鐩樹笂娌℃湁鐨勭鍙凤紝涓嶈兘鐩存帴鎵撳嚭锛屼絾鏄湪璁＄畻鏈轰腑鏈夊绉嶈緭鍏ユ柟寮忓彲浠ュ熷姪锛屽父瑙佹柟娉曞涓嬶細1銆佸浜庣櫨搴﹁緭鍏ユ硶銆佹悳鐙楁嫾闊宠緭鍏ユ硶绛夋瘮杈冮珮绾х殑绗笁鏂硅緭鍏ユ硶锛屽彲浠ョ洿鎺ヨ緭鍏ユ嫾闊斥減ai鈥濓紝閫夊瓧鍒楄〃涓氨浼氬嚭鐜拌繖涓瓧姣嶏紝鎸夊搴旀暟瀛楅敭閫夋嫨鍗冲彲銆2銆佸浜庢櫤鑳紸BC绛変綆绾ц緭鍏ユ硶锛屽彲浠ヤ娇鐢ㄨ蒋閿洏...
绛旓細蟺鏄笇鑵婅鐨勮緟闊冲瓧姣锛屼唬琛鍦嗗懆鐜锛岃嫳璇涓簆i銆傚渾鍛ㄧ巼鏄渾鐨勫懆闀夸笌鐩村緞鐨勬瘮鍊肩殑鏁板甯告暟銆傚渾鍛ㄧ巼涓鑸彲浠ョ敤甯岃厞瀛楁瘝蟺琛ㄧず锛屜鐢辩憺澹瀛﹀绾︾堪路娴峰洜閲屽笇路鍏颁集鐗逛簬1761骞磋瘉鏄庣殑锛屾槸涓棤鐞嗘暟銆1882骞寸敱鏋楀痉鏇艰瘉鏄庢槸瓒呰秺鏁帮紝瀹冪殑杩戜技鍊肩害绛変簬3.14159265359銆
绛旓細蟺鏄竴涓湪鏁板鍙婄墿鐞嗗棰嗗煙鏅亶瀛樺湪鐨勬暟瀛﹀父鏁 澶у啓鈭忥紝灏忓啓蟺锛堣嫳璇悕绉帮細Pi锛屾眽璇悕绉帮細娲 锛夛紝鏄鍗佸叚涓笇鑵婂瓧姣銆澶у啓瀛楁瘝鈭忥細鏁板涓繛涔樼Н鐨勭畻瀛 灏忓啓瀛楁瘝蟺锛氭暟瀛﹀父鏁鍦嗗懆鐜锛屽渾鍛ㄧ巼鏄寚骞抽潰涓婂渾鐨勫懆闀夸笌鐩村緞涔嬫瘮銆傦紙鍏跺煎墠涓冧綅涓3. 1415926锛屾洿璇︾粏鐨勬暟鍊艰鏌ョ湅璇嶆潯鍦嗗懆鐜囷級鍑芥暟 (鏁板)蟺(n...
绛旓細鈭忥紙pai銆/paɪ/锛甯岃厞瀛楁瘝锛屾槸蟺鐨勫ぇ鍐欏舰寮忋傛暟瀛﹁繍绠椾腑琛ㄧず姹傜Н杩愮畻鎴栫洿绉繍绠椼
绛旓細蟺鏄竴涓湪鏁板鍙婄墿鐞嗗棰嗗煙鏅亶瀛樺湪鐨勬暟瀛﹀父鏁般傚ぇ鍐欌垙锛屽皬鍐櫹锛堣嫳璇悕绉帮細Pi锛屾眽璇悕绉帮細娲 锛夛紝鏄鍗佸叚涓笇鑵婂瓧姣銆 鏁板涓繛涔樼Н鐨勭畻瀛愩灏忓啓瀛楁瘝锛毾銆傛暟瀛﹀父鏁鍦嗗懆鐜锛屽渾鍛ㄧ巼鏄寚骞抽潰涓婂渾鐨勫懆闀夸笌鐩村緞涔嬫瘮銆傦紙鍏跺煎墠涓冧綅涓3. 1415926锛屾洿璇︾粏鐨勬暟鍊艰鏌ョ湅璇嶆潯鍦嗗懆鐜囷級銆傚嚱鏁帮紙鏁板锛壪锛坣锛...
绛旓細蟺鏄笇鑵婂瓧姣 锛屽畠涔熸槸锛氣憼鍦嗗懆鐜 鈶″嚱鏁 (鏁板)蟺锛坣锛変负涓嶅ぇ浜巒鐨勮川鏁颁釜鏁 鈶㈢矑瀛愮墿鐞嗗涓殑蟺浠嬪瓙 鈶Ｏ閿紝涓绫诲師瀛愯建閬撯滆偐骞惰偐鈥濋噸鍙犲舰鎴愮殑鍖栧閿 鈶ゅ井瑙傜粡娴庡涓殑鍒╂鼎 鈶ョ粡娴庡涓殑鐗╀环鎸囨暟 鈶犲渾鍛ㄧ巼 灏氭湭鏈夊噯纭硷紝绾︿负3.1415926535897932384626433832795028841971693993751058209749445923078164 ...
绛旓細鍦嗗懆鐜囨槸鐢ㄥ笇鑵婂瓧姣嵪鏉ヨ〃绀虹殑锛屜鈮3.1415926鈥︹︼紝鐜板彇灏忔暟鐐瑰悗涓や綅鏁帮紝閭ｄ箞1蟺=3.14锛2蟺=6.28锛3蟺=9.42锛4蟺=12.56锛5蟺=15.7锛6蟺=18.84锛7蟺=21.98锛8蟺=25.12锛9蟺=28.26锛10蟺=31.4銆11蟺=35.45锛12蟺=37.68锛13蟺=40.83锛14蟺=43.96锛15蟺=47.1锛16蟺=50...
