Ʒѧ̰ | Excellent teaching plan
1μʾ1 ͼж߶Σߣֱߣ ߶˵㣬ԵAΪ˵㣬һǵBCDԵõ3߶ΣԵBΪ˵㣬һǵCDԵõ2߶ΣԵCΪ˵㣬һǵDԵõ1߶Ρ һ˵㣬ԷֱԵABCDΪ˵㣬448 ߺ߶ζֱߵһֻ֣1ֱߡ ߶Σ3216() ߣ428() ֱֻ1 2μʾ2 εһڽ45㣬ڽǸǶٶȣ ǵεص㼰ڽǺ͵֪ʶ һеһ45㣬һҲ45㣬Ϊ180㣭45290㡣 εĶ45㣬ǾΪ(180㣭45)267.5㡣 紺绯꣬ҵϧɻ
Ʒѧ̰ | Excellent teaching plan
һ45 90 67.5 67.5 ̽ 1ʾ̽ݡ ABλںӰ࣬ǵӰľֱΪACBDҪڰCDϽһˮˮˮںδʹˮʡ 2СŪ屾֪ʶʲô(ʦѲӲָ) 3㱨̽˵˼· ȷҪʹˮʡCDмһEʹAEBEĺСΪ֮߶̣ӳACFʹACCFBFCDཻڵEEFAEڵEһˮʹˮʡҲͬķӳBD 4Сᡣ ⣬ҪදԽŪ忼֪ʶ㣬Ȼͼʾѧ֪ʶн ѿܽ ͨڿεĸϰʲô Ѳҵ 紺绯꣬ҵϧɻ
Ʒѧ̰ | Excellent teaching plan
̲86ҳһ87ҳ123⡣ ƽͼεʶ ֱ?????߶νǣǡֱǡ۽ǡƽǡܽ??ƽͼ????? ?? ??ıΣΡƽıΡ?ֱͼ? ΡΣΣΡ??? Ρ??Բ??ͼ??Բ2ʱ ͼεʶ ΣǷ֡߷֣ǰ ̾ PPTμ ѧ ̸ ̸СѧѧϰЩͼΣЩͼνз֣࣬ ȷ(1)ѧ塢塢ԲԲͼΡ (2)Щͼηֳ࣬塢Ϊһ࣬ΪƽΧɵģԲԲΪһ࣬ΪƽΧɵġ 룺ǾͷϰЩͼε֪ʶ() ѻع 紺绯꣬ҵϧɻ
Ʒѧ̰ | Excellent teaching plan
1塣 ʲôص㣿 (1)ص㡣 ٳ6涼dz(ʱ2Ե) ڳ6棬8㣬12⡣ԵȣԵijȡ (2)ص㡣 6涼Σ6ȡ 12⣬ⳤȣ8㡣 Կij塣 2ԲԲ ԲԲʶ(ɻش) Ԥ 1Բϡ棬ԲȵԲ 2ԲIJһ档Բ֮ľߡԲߡ 3ԲĵһԲԲIJһ档 4ԲĶ㵽ԲĵľԲĸߣԲֻһߡ 5ԲĸʱȰԲĵƽһƽˮƽطԲĶϣֱƽ͵֮ľ룬Բĸߡ 3۲塣 ڹ۲Щܣ Ԥ 1ѳϣֻͬʱ档 紺绯꣬ҵϧɻ