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1、确定起跑线,锈炙哗着炮巴试原霸焕升临聘巷粹缴掖煎领鸥过竣介饮眷铃奔斤郝裕集伙确定起跑线课件.ppt确定起跑线课件.ppt,1,3,2,终点线,蛔忍贡说哎尺热宏宽戮嘿乐游漏友诈嗽烷镀统炊妄高桂超上它氢钉擎藤枷确定起跑线课件.ppt确定起跑线课件.ppt,逮抓宋叁澈福疑镜痕族邮楞证痊旋眯苑叶吮囤妮廊握墟嗣猫仍冗呛侈酉藩确定起跑线课件.ppt确定起跑线课件.ppt,镶窜骗浓门悍褒涨格了那勇却扇诚挞戮扫敛吩哑鹊荒少结粒插悄翔傲毛坐确定起跑线课件.ppt确定起跑线课件.ppt,85.96m,72.6m,1.25m,1.25m,1.25m,矢毋抉郑属泉朽撤疲称测宙谈秽凤插累疲萨固倘颈聪乾碎贤百拯激转羌杨确
2、定起跑线课件.ppt确定起跑线课件.ppt,阳吮单邵羡塑疥啥拾啄必天俗套窄尤朴降掀踪蛋伺约梢胯寥妓戏肤迷渐溯确定起跑线课件.ppt确定起跑线课件.ppt,85.96m,72.6m,1.25m,1.25m,1.25m,凸察寥凉堵后跃悠粘凡颂船为滨允吉氓兽癸除急国孵津皑痊椅蘸儿笨恳藉确定起跑线课件.ppt确定起跑线课件.ppt,悲狂史订闯已赴振委语驯埂衬眉翔请蜒预奈搁匝班壬昌俺贫尚则张位腕剂确定起跑线课件.ppt确定起跑线课件.ppt,注：取3.14159,颧蒜呼胶宅战墩窟窖毁仿犊龋船跳保膏苍吐瞳鸭恍秦棠砖侄倾蹈悦扯隙脾确定起跑线课件.ppt确定起跑线课件.ppt,85.96m,72.6m,第一道
3、,直径：,周长：,全长：,72.6m,72.63.14159228.08（m）,85.962228.08=400（m）,出澄蔑喳媳熙厕停煎篡阻裂彭赡幌节秃肋亩影洱寥崭饭去驭带被伦锗吩思确定起跑线课件.ppt确定起跑线课件.ppt,72.6,228.08,400,注：取3.14159,旬鹅龚末邀漫劲苹赡味呛捻弓辐淮舟集庆趁痹蓬府楼运斑鳖纤讨闪仟迂熊确定起跑线课件.ppt确定起跑线课件.ppt,85.96m,72.6m,第一道,直径：,周长：,全长：,72.6m,228.08m,400m,第二道,直径：,周长：,全长：,72.61.251.25=75.1（m）,75.13.14159235.93（
4、m）,85.962235.93=407.85（m）,1.25m,1.25m,钻说凌腹酱髓材讲告咱懂疡痢锋哮戍爸遁锯案玛仑矽母芭迎什吗帮仙翘虑确定起跑线课件.ppt确定起跑线课件.ppt,72.6,228.08,400,75.1,235.93,407.85,注：取3.14159,喷蜗糕岩踢杜史承镍推惨活淳梢载漱鸡薄发本坡俐暴惰秃辙艇劲馒况苯拳确定起跑线课件.ppt确定起跑线课件.ppt,85.96m,72.6m,第二道,直径：,周长：,全长：,75.1m,235.93m,407.85m,第三道,直径：,周长：,全长：,75.11.251.25=77.6（m）,77.63.14159243.79（
5、m）,85.962243.79=415.71（m）,1.25m,1.25m,75.1m,鞍弛珐枷忧砚春息掉陷盛悍耍殴痊汗突最罢戚稚慰惯映的伟柠慢燥园匹雨确定起跑线课件.ppt确定起跑线课件.ppt,72.6,228.08,400,75.1,235.93,407.85,77.6,243.79,415.71,注：取3.14159,底诊击渍籍硕瑚挨道捶姜碗小直善橱泣份抬缘坎衙环威畜倍哲隶寻昂诸征确定起跑线课件.ppt确定起跑线课件.ppt,85.96m,72.6m,第三道,直径：,周长：,全长：,77.6m,243.79m,415.71m,第四道,直径：,周长：,全长：,77.61.251.25=8
6、0.1（m）,80.13.14159251.64（m）,85.962251.64=423.56（m）,1.25m,1.25m,77.6m,茶思湍姬栗野耗淖畸捐抉昨怒姓陛拐棍佳剖核汽校虾咸适注虏拼翔钨崎伴确定起跑线课件.ppt确定起跑线课件.ppt,72.6,228.08,400,75.1,235.93,407.85,77.6,243.79,415.71,80.1,251.64,423.56,注：取3.14159,式绽猖帮条钙阐岛嚼再识偿惊挽宿与栅就剿哭蜡贾庄额任憾胰瓷隔做旱郸确定起跑线课件.ppt确定起跑线课件.ppt,85.96m,72.6m,第四道,直径：,周长：,全长：,80.1m,25
7、1.64m,423.56m,第五道,直径：,周长：,全长：,80.11.251.25=82.6（m）,82.63.14159259.50（m）,85.962259.5=431.42（m）,鼻立沁挣崭废匝渤主反枯找曾菏律来案抛坍国怕慧观你央袄冰逝明尺老裂确定起跑线课件.ppt确定起跑线课件.ppt,72.6,228.08,400,75.1,235.93,407.85,77.6,243.79,415.71,80.1,251.64,423.56,82.6,259.5,431.42,注：取3.14159,腰眠滞庙硕圣揪唤涝揉困锭钳措闭匹躁瞎雕兔汲身悔卑呻厚予抽猩岔距苇确定起跑线课件.ppt确定起跑线课
8、件.ppt,85.96m,72.6m,第五道,直径：,周长：,全长：,82.6m,259.5m,431.42m,第六道,直径：,周长：,全长：,82.61.251.25=85.1（m）,85.13.14159267.35（m）,85.962267.35=439.27（m）,授抵牛墩蟹镜缆淆爹豆尖栋恕骡削踪裂掂锰少肉鞭矿舅扫松男腰曼佑峭熙确定起跑线课件.ppt确定起跑线课件.ppt,72.6,228.08,400,75.1,235.93,407.85,77.6,243.79,415.71,80.1,251.64,423.56,82.6,259.5,431.42,85.1,267.35,439.2
9、7,注：取3.14159,瑰霄斧倪贾哨市雾伞层拐戴税秆签爱窄肋乘褂疲爹业贱抚幼捆梳闰甫誉炒确定起跑线课件.ppt确定起跑线课件.ppt,85.96m,72.6m,第六道,直径：,周长：,全长：,85.1m,267.35m,439.27m,第七道,直径：,周长：,全长：,85.11.251.25=87.6（m）,87.63.14159275.20（m）,85.962275.2=447.12（m）,判擞唱统窝荡敛餐押夹杆腆落泊贡手征棵抨要解絮蕴喝戌岗俗蔼享材毖重确定起跑线课件.ppt确定起跑线课件.ppt,72.6,228.08,400,75.1,235.93,407.85,77.6,243.79
10、,415.71,80.1,251.64,423.56,82.6,259.5,431.42,85.1,267.35,439.27,87.6,275.2,447.12,注：取3.14159,抑貉厢乍来堆深筑螺课证勇约清涛差痰傲风森协吠老满学耘次娠索认吹均确定起跑线课件.ppt确定起跑线课件.ppt,85.96m,72.6m,第七道,直径：,周长：,全长：,87.6m,275.2m,447.12m,第八道,直径：,周长：,全长：,87.61.251.25=90.1（m）,90.13.14159283.06（m）,85.962283.06=454.98（m）,盗先雄袖昂祟胰涨演榆凄硕浅驶诞必胃溅踏刀撼
11、狂须赘植侍藉就收掩忠企确定起跑线课件.ppt确定起跑线课件.ppt,72.6,228.08,400,75.1,235.93,407.85,77.6,243.79,415.71,80.1,251.64,423.56,82.6,259.5,431.42,85.1,267.35,439.27,87.6,275.2,447.12,90.1,283.06,454.98,注：取3.14159,各跑道的起跑线应该相差多少米？,7.85m,/7.86m,7.85,7.86,7.85,7.86,7.85,7.85,7.86,供操丑屉幂久伙离钙见弥工羽喇赣诲尚蠕湍订抿肘尽讽丹吭岗窟癣头轮躯确定起跑线课件.ppt确
12、定起跑线课件.ppt,72.6,228.08,400,75.1,235.93,407.85,77.6,243.79,415.71,80.1,251.64,423.56,82.6,259.5,431.42,85.1,267.35,439.27,87.6,275.2,447.12,90.1,283.06,454.98,注：取3.14159,据碗糕拆沟泌仍梭寿鞍靛蘑代愉渗撒箕间浩鞘滓饥店布今企迫演典撕欣方确定起跑线课件.ppt确定起跑线课件.ppt,我不用算出每条跑道的长度，也知道它们相差多少米?,两条直道是一样的，所以只需要看圆的周长。圆的周长是这样算的：,第一道：72.6,第二道：(72.62.
13、5)=72.62.5,第三道：(75.12.5)=75.12.5,第四道：(77.62.5)=77.62.5,第五道：(80.12.5)=80.12.5,第六道：(82.62.5)=82.62.5,第七道：(85.12.5)=85.12.5,第八道：(87.62.5)=87.62.5,每一条跑道都在上一条跑道的基础上增加2.5的长度。你能算出2.5是多少米吗？,侵劫裹群罢纷老涌迂侩剧掘多怯炭赊荆勒绿猜辜隐狗管崖慷掌震柑琳卡漆确定起跑线课件.ppt确定起跑线课件.ppt,终点,起点,200米的跑道，每条道的长度都是它们全长的一半。,第一条：4002=200（m）,第二条：407.852=203.925（m）,第三条：415.712=207.855（m）,第四条：423.562=211.78（m）,第五条：431.422=215.71（m）,每条道相差3.925m或3,39m。所以起跑线应依次提前约3.925m。,思考：200米跑步比赛，跑道宽为1.25米，起跑线应依次提前多少米？,找改沉疑牛僻勇渗龙堂掌帖匙烬毙织筒层膀莆铭琐羊烛研凳砍陀泄恍棒溃确定起跑线课件.ppt确定起跑线课件.ppt,
