如图所示是某种型号的正六角螺母毛坯的三视图，则它的侧面积为（ ）cm 2 。 （2007?济南）如图所示是某种型号的正六角螺母毛坯的三视图...

\u5982\u56fe\u6240\u793a\u662f\u67d0\u79cd\u578b\u53f7\u7684\u6b63\u516d\u89d2\u87ba\u6bcd\u6bdb\u576f\u7684\u4e09\u89c6\u56fe\uff0c\u6c42\u5b83\u7684\u8868\u9762\u79ef

\u4fa7\u9762\u79ef=6\u00d73\u00d72=36\uff08cm2\uff09\uff0c\u5e95\u9762\u4e3a\u8fb9\u957f\u4e3a2cm\u7684\u6b63\u516d\u8fb9\u5f62\uff0c\u5b83\u53ef\u5206\u62106\u4e2a\u8fb9\u957f\u4e3a2cm\u76846\u4e2a\u7b49\u8fb9\u4e09\u89d2\u5f62\uff0c\u6240\u4ee5\u4e00\u4e2a\u5e95\u9762\u79ef\u662f\uff1a6\u00d734\u00d722=63\uff08cm2\uff09\uff0c\u8868\u9762\u79ef=\uff0863\uff09\u00d72+36=\uff08123+36\uff09cm2\uff0e

\u4fa7\u9762\u79ef=6\u00d73\u00d72=36\uff08cm2\uff09\uff0c\u5e95\u9762\u53ef\u4ee5\u770b\u505a2\u4e2a\u7b49\u8170\u68af\u5f62\u7ec4\u6210\uff0c\u5b83\u4eec\u7684\u9ad8\u662f\uff1a22-12=3\uff08cm\uff09\uff0c\u6240\u4ee5\u4e24\u4e2a\u5e95\u9762\u79ef\u662f\uff1a2\u00d72\u00d73(2+4)2=123\uff08cm2\uff09\uff0c\u8868\u9762\u79ef=\uff08123+36\uff09cm2\uff0e

侧面积=2*3*6=36cm2

总面积=12+36

它的侧面积为（2x3x6=36 ）cm²

36

濡傚浘鎵绀烘槸鏌愮鍨嬪彿鐨勬鍏铻烘瘝姣涘澂鐨勪笁瑙嗗浘,姹傚畠鐨勮〃闈㈢Н.
绛旓細琛ㄩ潰绉=锛6 3 锛壝2+2脳6脳3=锛12 3 +36锛塩m 2 锛

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绛旓細渚ч潰绉=2*3*6=36cm2 鎬婚潰绉=12+36

(2007?娴庡崡)濡傚浘鎵绀烘槸鏌愮鍨嬪彿鐨勬鍏铻烘瘝姣涘澂鐨勪笁瑙嗗浘,鍒欏畠鐨勮〃闈㈢Н...
绛旓細渚ч潰绉=6脳3脳2=36锛坈m2锛夛紝搴曢潰鍙互鐪嬪仛2涓瓑鑵版褰㈢粍鎴愶紝瀹冧滑鐨勯珮鏄細22-12=3锛坈m锛夛紝鎵浠ヤ袱涓簳闈㈢Н鏄細2脳2脳3(2+4)2=123锛坈m2锛夛紝琛ㄩ潰绉=锛123+36锛塩m2锛

濡傚浘鎵绀烘槸鏌愮鍨嬪彿鐨勬鍏铻烘瘝姣涜儦鐨勪笁瑙嗗浘,鍒欎粬鐨勮〃闈㈢Н涓?
绛旓細36+12(鏍瑰彿3锛夊叚涓晶闈2*3*6=36锛屼袱涓簳闈6鏍瑰彿3*2=12锛堟牴鍙3锛

濡傚浘鏌愮鍨嬪彿鐨勬鍏铻烘瘝姣涙煾鐨勪笁瑙嗗浘,鍒欏畠鐨勮〃闈㈢Н涓
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绛旓細B 璇曢鍒嗘瀽锛氫粠u-t鍥捐薄鐪嬪嚭锛屾瘡涓懆鏈熺殑鍓嶅崐鍛ㄦ湡鏄寮﹀浘褰紝鍏舵湁鏁堝间负220V锛涘悗鍗婂懆鏈熺數鍘嬩负闆躲傛牴鎹湁鏁堝肩殑瀹氫箟锛 锛屽緱U=156V锛岄塀鐐硅瘎锛氬湪姹傝В浜ゅ彉鐢垫祦鏈夋晥鍊兼椂锛岃鐞嗚В鍏跺畾涔夋牴鎹畾涔夋眰瑙ｏ紝涓鑸椂鍊欒鐨勬椂闂翠负涓涓懆鏈燂紝鏍规嵁鐑晥搴旀眰瑙ｏ紝姝ｅ鸡鍜屼綑寮︿氦鍙樼數娴佺殑宄板煎拰鏈夋晥鍊兼绘槸宸0.707鍊 ...

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绛旓細鐢盤=UI鍙緱锛欼=PU锛1涓伅娉′娇鐢ㄧ數鍘嬫槸220V锛屾墍浠ラ氳繃杩欑鐏场鐨勭數娴侊細I=PU=60W220V=311A锛10A梅311A=1103鈮36.7锛堜釜锛夛紝鍥犱负鐢垫祦閲忎笉鑳借秴杩囩數鑳借〃鐨勬渶澶у硷紝鎵浠ュ厑璁告帴杩欑鐏场36涓紟鏁呴塀锛

璁鏌愮鍨嬪彿鐨鐢靛瓙鍏冧欢鐨勫鍛借繎浼肩殑鏈嶄粠姝ｆ佸垎甯僋(160,20^2),闅忔満閫4...
绛旓細P瀵垮懡>=180=1-p(X<180)=1-p((X-160)/20<1)=1-鏍囧噯姝ｅお(1)娌℃湁涓鍙鍛藉皬浜180鐨勬鐜囩瓑浜庡鍛介兘澶т簬绛変簬180,姒傜巼涓簆^4

鏈夊叧鏁板瑙嗗浘鐨勯棶棰,銆
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