һԲ
ⲻһԲϻʲô˼?
ⲻһԲϻʲô˼? 2013-06-04 20:50 쿴10 | ֻ֪ | :ѧ иõĴ : Ĭ|ʱ1ش 2013-06-04 20:59qq1011093549|һڵpartyľ,һ˳:ⲻһԲ,ƨɾǹꡣ ǰһ˵Ůĵط(
һԲһԲת,1Ȧ2Ȧ?
2ȦһȦתһȦת1ԲͶԲ뾶ʱԲƽֳ4ȷݣ˳ʱӱA(ңB£CDϣ...
뾶Ϊ1һԲy=xڹ,ԲĻ...
@PauseAndPonderѣԲڹʱtȡ㣬Ϊ˼Բĵλã=y(1+y2)3/2=2(1+4x2)3/2=1 ...
һԲ?
10һһԲ10
һԲ, - - - ֱ, - - - 뾶.
ͬһԲ,ֱ,뾶. ʴΪ:,. ֱͨԲIJ˶Բϵ߶;뾶ԲĺԲһ߶;ݴ˿֪:һԲ,...
һԲİ뾶1,ֱ - - - ,ܳ...
(1)12=2();(2)23.141=6.28();(3)3.1412=3.141=3.14(ƽ).:Բֱ2,ܳ6.28,3.14ƽ.ʴΪ:2,...
ΪʲôһԲ,Բֻ;һԲ...
ֻ㣬ԲʵԲǵдϣпܵԲһдȷԲҵ һ...
ˮӲһԲĺûһǵĺ?
1. Ӳҵ״ڷˮЧûоԵĺû֮֡2. һԪӲԲͺгΪڷˮʵܹˡ3. һǵӲȻС...
һԲԲ(Apollonius֮) - ٶȾ
3 DԲvߡ4 ߵķͼξҪԲ5 BCλuڲʱԲҲܵuڲ6 Bλu棬C...
һԲ,ֱ1.3,Ƕƽ?
s:,r:뾶,d:ֱs=*r² r=d/2 =3.1416926.s=*0.65²=1.32665ƽ