Home
Problem
Status
Contest
Workbook
User
Group
Forum
Register
Login
{"managingGroups":{},"author":"dawn_LL","updateTime":1536753868000,"title":"海伦公式","dislikeCnt":0,"content":"**海伦公式**\n![](https://ss0.baidu.com/6ONWsjip0QIZ8tyhnq/it/u\u003d3652749987,823871558\u0026fm\u003d58)\n公式描述:公式中a,b,c分别为三角形三边长,p为半周长,S为三角形的面积。","threadId":34604,"likeCnt":6,"createTime":1536753699000,"isWorkbook":false,"viewCnt":3121,"openness":2,"fav":false,"id":640,"trustable":false}