三个数学题
来源:百度知道 编辑:UC知道 时间:2024/06/05 06:54:07
[img]http://v1.86086.com/2006-9-17/3bmjoqjw.jpg[/img]
[img]http://v4.86086.com/2006-9-17/sjkf3q0e.jpg[/img]
[img]http://v2.86086.com/2006-9-17/woqdu2eq.jpg[/img]
问题,是图
http://v1.86086.com/2006-9-17/3bmjoqjw.jpg
http://v4.86086.com/2006-9-17/sjkf3q0e.jpg
http://v2.86086.com/2006-9-17/woqdu2eq.jpg
[img]http://v4.86086.com/2006-9-17/sjkf3q0e.jpg[/img]
[img]http://v2.86086.com/2006-9-17/woqdu2eq.jpg[/img]
问题,是图
http://v1.86086.com/2006-9-17/3bmjoqjw.jpg
http://v4.86086.com/2006-9-17/sjkf3q0e.jpg
http://v2.86086.com/2006-9-17/woqdu2eq.jpg
1. 33立方厘米(先不考虑遮挡的情况,算出每层的表面积,再减去遮挡住的)
2. 7(MN= MD+DN = 1/2AD+1/2BD = 1/2(AD+BD)= 1/2AB = AC =7)
3. 34(至于怎么走很难说清了.从A开始走5+4+5+3+5+4+5+3)