<p>如图10所示三角形截面对x轴的面积矩Sx为()<img alt="" src="https://file.gaojiufeng.cn/learnAppQuestion/11/e6/11e6cde4b5de4f4cec9db94f9ff03917.jpg" style="width: 100%;height: auto;"><img alt="" src="https://file.gaojiufeng.cn/learnAppQuestion/15/d9/15d9686e8851d9863a55ae984c753b85.jpg" style="width: 100%;height: auto;"></p>