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ֽ֪ʶ
954    λwww.fsyiqi.cn    ʱ䣺 2016-10-6  []
ֽֽֽоֽͼӹɲֽͨճ϶ɡƷװֽԼӹɵֽ塢ֽ塢㡢߲㡢ʮһֽ塣
ͬ״㣬ճɵֽĹҲͬʹʹֽֽͬεIJ죬ɵֽҲһ𡣹ͨõηΪ֣ǷֱA㡢C㡢BE㡣ǵļָҪһAƳɵֽнϺõĻԣһĵԣCA֮ͦȺͿA㣻BܶȴƳɵֽƽѹߣӡˢEڱܣĸǿȡ
װͷǼװҪ⾶ء潫ͨ±ϸгֽھ⾶֮Ĺϵ
ֽߴ
ֽߴΪʱϳߴ硣ߴչϵѹΪĻ׼лϵѹ۹ѹλѹһ ѹ۵ߡѹߵľߴ硣ߴתΪڡ⾶ߴͨ 2 ٳɣҲֱԼIJ

ֽеƴ˫ƴ֮
ƴһҳ䣬һܳСֽ䣻˫ƴҲΪҳ䣬еֽ̫ܳ󣬲òƬƴһֽ䣬ʱֽ䳧Ϊ ϣҲƬƴһߴ粻ֽ̫䣬ʱƬҳһҳȣһͷߵ һЩϸ΢IJ
ͷͻ˿
ֽͷߴˮƽȷֽΪ 35 ~ 40mm ˫ֽΪ 45 ~ 50mm ֽΪ 50mm
ֽչʱ뿼ǵл˿ģ˿ijߴֽȷһΪ 20 ~ 40mm
Ϊ˱ʵʹеļ㣬ͳһȡӡ 8 ӡ 4 Ĺ򣬼Ͻͷͻ˿ܺͶΪ 8cm ϻ˿ܺ϶Ϊ 4cm
1ƽ㹫ʽ
ͨϽܣƽʽʾ
ƴֽ S= + 2+8 + +4
˫ƴֽ S= + +8 2 + +4
עﳤߡ 8 4 ĵλΪ cm
ȫ²ʽֽչ
ȫ²ʽֽһͽСЩֽƳɣһǽõͿ׿ֽҩƷʳƷױƷ Сװ

г߸
ֽУг߸ߵĸΪҪһֽǿȽ֮ǧӶᵼֽȫϣ ɾ޴ʧ
гֱָ㷽ijȣ߸ָ˳㷽ijȡ
ͷ˿
ֽȷͷߴ磬ĽͷһΪ 3cm ĽͷһΪ 4cm˿ijߴͳһ 2cm 㡣
2ȫ²ʽֽ㹫ʽ
гL= + 2+ ͷ + ˿
߸ߣH= 1/2 + + + + ˿
S= L H
˵һֽDzʵеģֽչ󣬸ݲֽͬľ״ijߴͨȷIJǹ̶ģͷͻ˿ijߴӲͬһԡ
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