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ϴڣ2015729ա:1068

ڹҵķչ嶼ٲ˹Ϊйֲֳ˾ҲDzɺӵֻIJֳЧһΪֺ
ְͷ׼
һ A ƽ B C Բ
ͻ϶ǴݱƩĿݱԲĿݱ仡ֻǵߵѡµdzֵͬҲͽȻͬ
ƽֵҪ󣺰ҪøӡֽܶȰı߸ 5cm ֶ̻Ӧֱֵ߿ģ(ڲ)ģ߿ﱵģߴƽȻﱵɰֵֽģ߼ĥԲ״һҪԲɰֽĥƽҲõԵ̻ģӹ߶ȺǴԲ
ֵҪ󣺵һͬƽֵֻͬǸ߼ݲĥԲ״ڶӸֵĴСʻĿխ(ʻӵڶһм߿бǷΪ 90 ֱ
Դ˽λӸߵĺȻѡʵ 45 бǵڶ๦ϳ泯¿ 502 ˮ뽺ˮڴ⽥ĸλϽˮʹӲЩѹʱģûгּIJλüӸߵļӸλش򲻵ֹֻ
ģԲֵҪ󣺵һͬƽֵֻͬǸ߼ݲĥԲ״ڶӸӸߵĺҪֵĴСɱЭһĶֻͬǵõԲǵ
ϵװҪ
1 װģıҪԲĽҪĥԲȺб(Ľխ¿)Էģ
2 װģײɰֽĥһ¼ǶȲҪ̫Сװƴʱķ϶
ϵװģߵļ㷽
ϵװģߵļ㷽㷨ڵȷݷָɿĵװ
һģߺָɿ㷨£
1 ܳȼװ߳ߴʣҪģߵܳ
2 ʣҪģߵܳȳԵȷݷָĿҪװģߵijߴ
3 ܿȼװ߳ߴҪװģߵijߴ
4  2 ijߴ 5 װƴʱ϶(ҲƴӲϵ)
5 ܳߴijɳͺĶϵװƴһڵװ
ڶģߺȫָɿʱ㷨£
1 ܳȼװ߳ߴʣҪģߵܳʣҪģߵܳȳԵȷݷָĿҪװģߵijߴ
3 ܿȼװ߳ߴʣҪģߵܿ
4 ʣҪģߵܿȳԵȷݷָĿҪװģߵijߴ
5  2 4 ijߴֱ 5 װƴʱ϶(ҲƴӲϵ)
6 ܳߴijɳͺĶϵװƴһڵװ
ͺֺ͵װ߳ߴ
1 ͺڲͬµ߳ߴ
A װƴʱ 3 ҵı
B ֵʱ 1 ҵı
C ѹƺҪ˹Χֵıֵ߳ߴΪ 5 
2 װ߳ߴ 2 3 
ճӵװο
1 һճֵĵװ巴ģײһչƹ
2 ڶƹⷢԿֵĿIJλֵҪοյĵطޱߵֱԴĿȻľޱ߻ϰޱߵŽõĿмλ(½ȵԴڰĵĺ)ο
תأ

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