打开App
360P
学会了三角形等底同高的原理，求阴影部分的面积原来这么简单！
经典几何题13/31
App05:20
App05:30
App03:44
App07:33
App07:42
App03:18
App05:57
App04:54
App04:39
App04:16
App04:30
App09:31
App07:41
App04:46
App10:07
App05:16
App09:23
App04:47
App08:00
App07:05打开App观看
