小小阴影挡不住我 .(单位:cm) 求阴影部分面积
来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:数学作业 时间:2024/07/19 15:53:11
小小阴影挡不住我 .(单位:cm) 求阴影部分面积
![](http://img.wesiedu.com/upload/9/8b/98b47fd45dca6ac40e8de621246bb875.jpg)
![](http://img.wesiedu.com/upload/9/8b/98b47fd45dca6ac40e8de621246bb875.jpg)
![小小阴影挡不住我 .(单位:cm) 求阴影部分面积](/uploads/image/z/16812651-3-1.jpg?t=%E5%B0%8F%E5%B0%8F%E9%98%B4%E5%BD%B1%E6%8C%A1%E4%B8%8D%E4%BD%8F%E6%88%91+.%28%E5%8D%95%E4%BD%8D%3Acm%29+%E6%B1%82%E9%98%B4%E5%BD%B1%E9%83%A8%E5%88%86%E9%9D%A2%E7%A7%AF)
S大正方形+S小正方形-1/2S正方形-S△大-S△小
=8²+4²-1/2×4²-1/2×8×(8+4)-1/2×8×(8-4)
=64+16-8-48-16
=8
=8²+4²-1/2×4²-1/2×8×(8+4)-1/2×8×(8-4)
=64+16-8-48-16
=8