锟斤拷锟斤拷锟斤拷锟缴讹拷锟斤拷锟斤拷一锟斤拷锟斤拷锟斤拷锟侥幾何讹拷锟斤拷锟斤拷指直锟斤拷锟斤拷锟斤拷锟轿的兩條直锟斤拷邊锟斤拷平锟斤拷锟酵碉拷锟斤拷斜邊锟斤拷平锟斤拷锟斤拷锟叫囷拷锟脚达拷锟絈直锟斤拷锟斤拷锟斤拷锟轿為勾锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷直锟斤拷邊锟斤拷锟絕小锟竭為勾锟斤拷锟斤拷一锟絃直锟斤拷邊锟斤拷锟�锟斤拷斜邊锟斤拷锟斤拷锟斤拷锟斤拷锟皆稱锟紷锟斤拷锟斤拷锟斤拷楣达拷啥锟斤拷锟斤拷锟揭诧拷锟斤拷朔Q锟教高讹拷锟斤拷锟斤拷

锟斤拷锟斤拷1锟斤拷锟缴讹拷锟斤拷锟狡岋拷(d锟斤拷o)锟斤拷锟絎锟斤拷锟斤拷锟斤拷C锟斤拷

锟斤拷锟斤拷锟节歐锟斤拷锟斤拷玫摹锟斤拷缀锟皆�锟斤拷锟斤拷一锟斤拷锟叫給锟斤拷锟斤拷锟缴讹拷锟斤拷锟斤拷锟斤拷锟斤拷锟紺锟斤拷锟斤拷锟絆(sh锟斤拷)锟斤拷ABC锟斤拷一直锟斤拷锟斤拷锟斤拷锟轿ｏ拷锟斤拷锟斤拷A锟斤拷直锟斤拷锟斤拷锟斤拷A锟絚锟斤拷一直锟斤拷锟斤拷锟斤拷邊锟斤拷使锟戒垂直锟节岋拷邊锟斤拷锟斤拷锟絃锟剿撅拷锟窖岋拷邊锟较碉拷锟斤拷锟斤拷锟斤拷一锟街烇拷锟�锟斤拷锟斤拷锟斤拷e锟街別锟絚锟斤拷锟斤拷锟缴傦拷锟斤拷锟斤拷锟斤拷锟斤拷锟�锟斤拷

锟斤拷锟斤拷锟斤拷锟紷锟斤拷锟斤拷锟斤拷锟斤拷锟紺锟斤拷锟叫ｏ拷锟揭傦拷锟斤拷要锟斤拷锟斤拷锟侥傦拷锟給锟斤拷锟斤拷锟斤拷锟斤拷

锟斤拷锟斤拷锟斤拷锟斤拷蓚锟斤拷锟斤拷锟斤拷锟斤拷袃山M锟斤拷锟斤拷(y锟斤拷ng)邊锟斤拷锟紷锟缴組邊锟斤拷锟紸锟侥斤拷锟斤拷锟�锟斤拷锟絫锟斤拷锟斤拷锟斤拷锟斤拷全锟斤拷锟斤拷锟斤拷SAS锟斤拷

锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷e锟斤拷锟斤拷一同锟斤拷同锟斤拷之平锟斤拷锟斤拷邊锟斤拷锟斤拷e锟斤拷一锟斤拷锟斤拷

锟斤拷锟斤拷锟斤拷锟斤拷一锟斤拷锟斤拷锟斤拷锟轿碉拷锟斤拷e锟斤拷锟斤拷锟斤拷锟竭咃拷L锟侥乘積锟斤拷

锟斤拷锟斤拷锟斤拷锟斤拷一锟斤拷锟斤拷锟轿碉拷锟斤拷e锟斤拷锟斤拷锟斤拷锟竭咃拷L锟侥乘積锟斤拷

锟斤拷锟斤拷锟紺锟斤拷锟斤拷思路锟介：锟斤拷A锟絚锟斤拷一直锟斤拷锟斤拷锟斤拷邊锟斤拷使锟戒垂直锟节岋拷邊锟斤拷锟斤拷锟絃锟剿撅拷锟窖岋拷邊锟较碉拷锟斤拷锟斤拷锟斤拷一锟街烇拷锟�锟斤拷锟斤拷锟较凤拷锟侥兩傦拷锟斤拷锟斤拷锟斤拷锟斤拷通锟絕锟饺革拷同锟阶碉拷锟斤拷锟斤拷锟轿ｏ拷锟斤拷锟斤拷锟斤拷e锟絇(gu锟斤拷n)系锟斤拷锟紻(zhu锟斤拷n)锟絈锟斤拷锟铰凤拷锟缴傦拷同锟斤拷锟斤拷e锟斤拷锟絃锟斤拷锟斤拷锟斤拷

锟斤拷锟斤拷锟絆(sh锟斤拷)锟斤拷ABC锟斤拷一直锟斤拷锟斤拷锟斤拷锟轿ｏ拷锟斤拷直锟角烇拷∠CAB锟斤拷

锟斤拷锟斤拷锟斤拷邊锟斤拷BC锟斤拷AB锟斤拷CA锟斤拷锟斤拷锟斤拷锟絃锟斤拷锟侥凤拷锟斤拷CBDE锟斤拷BAGF锟斤拷ACIH锟斤拷

锟斤拷锟斤拷锟斤拷锟斤拷锟絕锟絚A之BD锟斤拷CE锟斤拷平锟叫撅拷锟斤拷锟街別锟斤拷直BC锟斤拷DE锟斤拷K锟斤拷L锟斤拷

锟斤拷锟斤拷锟街別锟紹锟斤拷CF锟斤拷AD锟斤拷锟轿成★拷BCF锟斤拷锟斤拷BDA锟斤拷

锟斤拷锟斤拷∠CAB锟斤拷∠BAG锟斤拷锟斤拷直锟斤拷锟斤拷锟斤拷锟紺锟斤拷A锟斤拷G锟斤拷锟斤拷锟斤拷同锟斤拷锟斤拷锟紺B锟斤拷A锟斤拷H锟斤拷锟斤拷锟斤拷

锟斤拷锟斤拷∠CBD锟斤拷∠FBA锟斤拷锟斤拷直锟斤拷锟斤拷锟斤拷锟斤拷∠ABD=∠FBC锟斤拷

锟斤拷锟斤拷锟斤拷锟紸B=FB锟斤拷BD=BC锟斤拷锟斤拷锟皆★拷ABD锟秸★拷FBC锟斤拷

锟斤拷锟斤拷锟斤拷锟紸锟絚K锟斤拷L锟斤拷同一直锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷邊锟斤拷BDLK=2锟斤拷ABD锟斤拷

锟斤拷锟斤拷锟斤拷锟紺

锟斤拷锟斤拷A锟斤拷G锟斤拷同一直锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷BAGF=2锟斤拷FBC锟斤拷

锟斤拷锟斤拷锟斤拷锟斤拷锟竭咃拷锟紹DLK=BAGF=AB2锟斤拷

锟斤拷锟斤拷同锟斤拷锟斤拷锟紺锟斤拷锟斤拷邊锟斤拷CKLE=ACIH=AC2锟斤拷

锟斤拷锟斤拷锟斤拷锟紷锟缴傦拷锟結(ji锟斤拷)锟斤拷锟斤拷樱锟紸B2+AC2=BD×BK+KL×KC

锟斤拷锟斤拷锟斤拷锟斤拷BD=KL锟斤拷BD×BK+KL×KC=BD(BK+KC)=BD×BC

锟斤拷锟斤拷锟斤拷锟斤拷CBDE锟角傦拷锟斤拷锟斤拷锟轿ｏ拷锟斤拷锟紸B2+AC2=BC2锟斤拷锟斤拷a2+b2=c2锟斤拷

锟斤拷锟斤拷锟斤拷锟紺锟斤拷锟斤拷锟节歐锟斤拷锟斤拷谩锟斤拷缀锟皆�锟斤拷锟斤拷一锟斤拷锟斤拷1.47锟斤拷(ji锟斤拷)锟斤拷锟斤拷锟斤拷锟�锟斤拷

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锟斤拷锟斤拷2锟斤拷锟缴讹拷锟斤拷锟斤拷見知锟絉锟絚

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锟斤拷锟斤拷6锟斤拷直锟斤拷锟斤拷一锟絚锟絚直锟斤拷锟较革拷锟絚锟紹锟接碉拷锟斤拷锟叫撅拷锟斤拷锟叫ｏ拷锟斤拷锟斤拷锟斤拷锟斤拷锟�

锟斤拷锟斤拷7锟斤拷平锟叫癸拷锟斤拷锟斤拷(j锟斤拷ng)锟絕直锟斤拷锟斤拷一锟絚锟斤拷锟斤拷锟斤拷只锟斤拷一锟絣直锟斤拷锟絚锟紷锟絣直锟斤拷平锟斤拷

锟斤拷锟斤拷8锟斤拷锟斤拷锟斤拷蓷l直锟斤拷锟斤拷锟酵碉拷锟斤拷锟絣直锟斤拷平锟斤拷锟斤拷锟紷锟缴條直锟斤拷也锟斤拷锟斤拷平锟斤拷

锟斤拷锟斤拷9锟斤拷同位锟斤拷锟斤拷锟�锟斤拷锟斤拷直锟斤拷平锟斤拷

锟斤拷锟斤拷10锟斤拷锟斤拷(n锟斤拷i)锟絜锟斤拷锟斤拷龋锟斤拷锟街憋拷锟狡斤拷锟�

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锟斤拷锟斤拷12锟斤拷锟斤拷直锟斤拷平锟斤拷锟斤拷同位锟斤拷锟斤拷锟�

锟斤拷锟斤拷13锟斤拷锟斤拷直锟斤拷平锟斤拷锟斤拷锟斤拷(n锟斤拷i)锟絜锟斤拷锟斤拷锟�

锟斤拷锟斤拷14锟斤拷锟斤拷直锟斤拷平锟斤拷锟斤拷同锟皆冿拷(n锟斤拷i)锟角伙拷锟絘(b锟斤拷)

锟斤拷锟斤拷15锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟轿冿拷邊锟侥和达拷锟节碉拷锟斤拷邊

锟斤拷锟斤拷16锟斤拷锟斤拷論锟斤拷锟斤拷锟轿冿拷邊锟侥诧拷小锟节碉拷锟斤拷邊

锟斤拷锟斤拷17锟斤拷锟斤拷锟斤拷锟轿冿拷(n锟斤拷i)锟角和讹拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷(n锟斤拷i)锟角的和碉拷锟斤拷180"

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锟斤拷锟斤拷19锟斤拷锟斤拷論2锟斤拷锟斤拷锟轿碉拷一锟斤拷锟斤拷堑锟斤拷诤锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷膬蓚锟斤拷锟�(n锟斤拷i)锟角的猴拷

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锟斤拷锟斤拷锟斤拷锟絇(gu锟斤拷n)锟斤拷锟絔锟斤拷

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锟組锟斤拷"锟竭匡拷锟絎(w锟斤拷ng)"微锟脚癸拷锟斤拷號