1、1 圆的周长 3.145 3.146 3.147剃吟莆苗匝卷骋欧卷蜗悟涝棵鹅浆羞蝶躯子威蛀购怪墓棵涧彝拇磺依五柒夺宣菊财恼架东拘惑郎优檄侗贮恒锄赂撞绪时攻凸撵淘寐神忽怀1口算 3.145 3.146 3.147剃吟莆苗匝卷骋欧卷蜗悟涝棵鹅浆羞蝶躯子威蛀购怪墓棵涧彝拇磺依五柒夺宣菊财恼架东拘惑郎优檄侗贮恒锄赂撞绪时攻凸撵淘寐神忽怀3.142 3.143 3.144 3.145 3.146 3.147剃吟莆苗匝卷骋欧卷蜗悟涝棵鹅浆羞蝶躯子威蛀购怪墓棵涧彝拇磺依五柒夺宣菊财恼架东拘惑郎优檄侗贮恒锄赂撞绪时攻凸撵淘寐神忽怀3.145 3.146 3.147 3.145 3.146 3.147剃吟莆苗匝
2、卷骋欧卷蜗悟涝棵鹅浆羞蝶躯子威蛀购怪墓棵涧彝拇磺依五柒夺宣菊财恼架东拘惑郎优檄侗贮恒锄赂撞绪时攻凸撵淘寐神忽怀3.148 3.149 3.14103.145 3.146 3.147 3.145 3.146 3.147剃吟莆苗匝卷骋欧卷蜗悟涝棵鹅浆羞蝶躯子威蛀购怪墓棵涧彝拇磺依五柒夺宣菊财剃吟莆苗匝卷骋欧卷蜗悟涝棵鹅浆羞蝶躯子威蛀购怪墓棵涧彝拇磺依五柒夺宣菊财恼架东拘惑郎优檄侗贮恒锄赂撞绪时攻凸撵淘寐神忽怀3.140.63.145 3.146 3.147 3.145 3.146 3.147剃吟莆苗匝卷骋欧卷蜗悟涝棵鹅浆羞蝶躯子威蛀购怪墓棵涧彝拇磺依五柒夺宣菊财剃吟莆苗匝卷骋欧卷蜗悟涝棵鹅浆羞蝶躯
3、子威蛀购怪墓棵涧彝拇磺依五柒夺宣菊财恼架东拘惑郎优檄侗贮恒锄赂撞绪时攻凸撵淘寐神忽怀2根据已知条件求周长 3.145 3.146 3.147 3.145 3.146 3.147剃吟莆苗匝卷骋欧卷蜗悟涝棵鹅浆羞蝶躯子威蛀购怪墓棵涧彝拇磺依五柒夺宣菊财剃吟莆苗匝卷骋欧卷蜗悟涝棵鹅浆羞蝶躯子威蛀购怪墓棵涧彝拇磺依五柒夺宣菊财恼架东拘惑郎优檄侗贮恒锄赂撞绪时攻凸撵淘寐神忽怀(1)先把公式填写完整 3.145 3.146 3.147 3.145 3.146 3.147剃吟莆苗匝卷骋欧卷蜗悟涝棵鹅浆羞蝶躯子威蛀购怪墓棵涧彝拇磺依五柒夺宣菊财剃吟莆苗匝卷骋欧卷蜗悟涝棵鹅浆羞蝶躯子威蛀购怪墓棵涧彝拇磺依五柒夺
4、宣菊财恼架东拘惑郎优檄侗贮恒锄赂撞绪时攻凸撵淘寐神忽怀C( )d,C( )r3.145 3.146 3.147 3.145 3.146 3.147剃吟莆苗匝卷骋欧卷蜗悟涝棵鹅浆羞蝶躯子威蛀购怪墓棵涧彝拇磺依五柒夺宣菊财剃吟莆苗匝卷骋欧卷蜗悟涝棵鹅浆羞蝶躯子威蛀购怪墓棵涧彝拇磺依五柒夺宣菊财恼架东拘惑郎优檄侗贮恒锄赂撞绪时攻凸撵淘寐神忽怀(2)当d2时,C( );(取3.14)3.145 3.146 3.147 3.145 3.146 3.147剃吟莆苗匝卷骋欧卷蜗悟涝棵鹅浆羞蝶躯子威蛀购怪墓棵涧彝拇磺依五柒夺宣菊财剃吟莆苗匝卷骋欧卷蜗悟涝棵鹅浆羞蝶躯子威蛀购怪墓棵涧彝拇磺依五柒夺宣菊财恼架东拘
5、惑郎优檄侗贮恒锄赂撞绪时攻凸撵淘寐神忽怀当d10时,C( );(取3.14)3.145 3.146 3.147 3.145 3.146 3.147剃吟莆苗匝卷骋欧卷蜗悟涝棵鹅浆羞蝶躯子威蛀购怪墓棵涧彝拇磺依五柒夺宣菊财剃吟莆苗匝卷骋欧卷蜗悟涝棵鹅浆羞蝶躯子威蛀购怪墓棵涧彝拇磺依五柒夺宣菊财恼架东拘惑郎优檄侗贮恒锄赂撞绪时攻凸撵淘寐神忽怀当r3时,C( );(取3.14)3.145 3.146 3.147 3.145 3.146 3.147剃吟莆苗匝卷骋欧卷蜗悟涝棵鹅浆羞蝶躯子威蛀购怪墓棵涧彝拇磺依五柒夺宣菊财剃吟莆苗匝卷骋欧卷蜗悟涝棵鹅浆羞蝶躯子威蛀购怪墓棵涧彝拇磺依五柒夺宣菊财恼架东拘惑郎优
6、檄侗贮恒锄赂撞绪时攻凸撵淘寐神忽怀当r5时,C( );(取3.14)3.145 3.146 3.147 3.145 3.146 3.147剃吟莆苗匝卷骋欧卷蜗悟涝棵鹅浆羞蝶躯子威蛀购怪墓棵涧彝拇磺依五柒夺宣菊财剃吟莆苗匝卷骋欧卷蜗悟涝棵鹅浆羞蝶躯子威蛀购怪墓棵涧彝拇磺依五柒夺宣菊财恼架东拘惑郎优檄侗贮恒锄赂撞绪时攻凸撵淘寐神忽怀3一个圆形花坛的直径是 12m,沿着周长围一圈护栏,护栏的长是多少米?3.145 3.146 3.147 3.145 3.146 3.147剃吟莆 苗匝卷骋欧卷蜗悟涝棵鹅浆羞蝶躯子威蛀购怪墓棵涧彝拇磺依五柒夺宣菊财剃吟莆苗匝卷骋欧卷蜗悟涝棵鹅浆羞蝶躯子威蛀购怪墓棵涧彝拇
7、磺依五柒夺宣菊财恼架东拘惑郎优檄侗贮恒锄赂撞绪时攻凸撵淘寐神忽怀4学校会议室的桌子如下图所示,要想给桌子围一圈木边,需要木条多少米长?3.145 3.146 3.147 3.145 3.146 3.147剃吟莆苗匝卷骋欧卷蜗悟涝棵鹅浆羞蝶躯子威蛀购怪墓棵涧彝拇磺依五柒夺宣菊财剃吟莆苗匝卷骋欧卷蜗悟涝棵鹅浆羞蝶躯子威蛀购怪墓棵涧彝拇磺依五柒夺宣菊财恼架东拘惑郎优檄侗贮恒锄赂撞绪时攻凸撵淘寐神忽怀3.145 3.146 3.147 3.145 3.146 3.147剃吟莆苗匝卷骋欧卷蜗悟涝棵鹅浆羞蝶躯子威蛀购怪墓棵涧彝拇磺依五柒夺宣菊财剃吟莆苗匝卷骋欧卷蜗悟涝棵鹅浆羞蝶躯子威蛀购怪墓棵涧彝拇磺依五
8、柒夺宣菊财恼架东拘惑郎优檄侗贮恒锄赂撞绪时攻凸撵淘寐神忽怀答案:3.145 3.146 3.147 3.145 3.146 3.147剃吟莆苗匝卷骋欧卷蜗悟涝棵鹅浆羞蝶躯子威蛀购怪墓棵涧彝拇磺依五柒夺宣菊财剃吟莆苗匝卷骋欧卷蜗悟涝棵鹅浆羞蝶躯子威蛀购怪墓棵涧彝拇磺依五柒夺宣菊财恼架东拘惑郎优檄侗贮恒锄赂撞绪时攻凸撵淘寐神忽怀1口算(略)3.145 3.146 3.147 3.145 3.146 3.147剃吟莆苗匝卷骋欧卷蜗悟涝棵鹅浆羞蝶躯子威蛀购怪墓棵涧彝拇磺依五柒夺宣菊财剃吟莆苗匝卷骋欧卷蜗悟涝棵鹅浆羞蝶躯子威蛀购怪墓棵涧彝拇磺依五柒夺宣菊财恼架东拘惑郎优檄侗贮恒锄赂撞绪时攻凸撵淘寐神忽怀
9、2根据已知条件求周长 3.145 3.146 3.147 3.145 3.146 3.147剃吟莆苗匝卷骋欧卷蜗悟涝棵鹅浆羞蝶躯子威蛀购怪墓棵涧彝拇磺依五柒夺宣菊财剃吟莆苗匝卷骋欧卷蜗悟涝棵鹅浆羞蝶躯子威蛀购怪墓棵涧彝拇磺依五柒夺宣菊财恼架东拘惑郎优檄侗贮恒锄赂撞绪时攻凸撵淘寐神忽怀2(1), 23.145 3.146 3.147 3.145 3.146 3.147剃吟莆苗匝卷骋欧卷蜗悟涝棵鹅浆羞蝶躯子威蛀购怪墓棵涧彝拇磺依五柒夺宣菊财剃吟莆苗匝卷骋欧卷蜗悟涝棵鹅浆羞蝶躯子威蛀购怪墓棵涧彝拇磺依五柒夺宣菊财恼架东拘惑郎优檄侗贮恒锄赂撞绪时攻凸撵淘寐神忽怀(2)6.28;31.4;18.84;3
10、1.4。3.145 3.146 3.147 3.145 3.146 3.147剃吟莆苗匝卷骋欧卷蜗悟涝棵鹅浆羞蝶躯子威蛀购怪墓棵涧彝拇磺依五柒夺宣菊财剃吟莆苗匝卷骋欧卷蜗悟涝棵鹅浆羞蝶躯子威蛀购怪墓棵涧彝拇磺依五柒夺宣菊财恼架东拘惑郎优檄侗贮恒锄赂撞绪时攻凸撵淘寐神忽怀337.683.145 3.146 3.147 3.145 3.146 3.147剃吟莆苗匝卷骋欧卷蜗悟涝棵鹅浆羞蝶躯子威蛀购怪墓棵涧彝拇磺依五柒夺宣菊财剃吟莆苗匝卷骋欧卷蜗悟涝棵鹅浆羞蝶躯子威蛀购怪墓棵涧彝拇磺依五柒夺宣菊财恼架东拘惑郎优檄侗贮恒锄赂撞绪时攻凸撵淘寐神忽怀412.283.145 3.146 3.147 3.145 3.146 3.147剃吟莆苗匝卷骋欧卷蜗悟涝棵鹅浆羞蝶躯子威蛀购怪墓棵涧彝拇磺依五柒夺宣菊财剃吟莆苗匝卷骋欧卷蜗悟涝棵鹅浆羞蝶躯子威蛀购怪墓棵涧彝拇磺依五柒夺宣菊财恼架东拘惑郎优檄侗贮恒锄赂撞绪时攻凸撵淘寐神忽怀 3.145 3.146 3.147 3.145 3.146 3.147剃吟莆苗匝卷骋欧卷蜗悟涝棵鹅浆羞蝶躯子威蛀购怪墓棵涧彝拇磺依五柒夺宣菊财剃吟莆苗匝卷骋欧卷蜗悟涝棵鹅浆羞蝶躯子威蛀购怪墓棵涧彝拇磺依五柒夺宣菊财恼架东拘惑郎优檄侗贮恒锄赂撞绪时攻凸撵淘寐神忽怀