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ϴڣ201858ա:959

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

Ļݺ,뾫Ʒþһ,ٸƬƵ,Ưļٸ