tag:blogger.com,1999:blog-3550204829234352390.post3107531300055626592..comments2024-03-27T09:13:48.546+08:00Comments on 研發養成所 ( Bridan's Blog - 4rdp, For R&D Person ): 訓練數學感 219 ─ 三角形面積Bridanhttp://www.blogger.com/profile/17055047757114667099noreply@blogger.comBlogger2125tag:blogger.com,1999:blog-3550204829234352390.post-43190196532905730562021-09-11T20:32:43.116+08:002021-09-11T20:32:43.116+08:00正解,這題需用到 向量內積公式、餘弦第二定理來解三角形三個邊,再來就可以解 ∆ ABC 面積。正解,這題需用到 向量內積公式、餘弦第二定理來解三角形三個邊,再來就可以解 ∆ ABC 面積。Bridanhttps://www.blogger.com/profile/17055047757114667099noreply@blogger.comtag:blogger.com,1999:blog-3550204829234352390.post-78881830273044993612021-09-11T02:28:17.196+08:002021-09-11T02:28:17.196+08:0010*sqrt(3)10*sqrt(3)羅新義https://www.blogger.com/profile/05742804226035490922noreply@blogger.com