Contact us
Choose a category below so we can get back to you as quickly as possible.
三角形ABO CBO一看就是等高.面積比是2:3那麼Ao:OC=2:3所以三角形AOB與三角形DOC相似比2:3面積比4:9所以S三角形DOC=22.5所以.總共是10+15+15+22.5=62.5
We and our partners use cookies and other technologies to analyze traffic and optimize your experience. View more info and control your cookies settings at any time in our Cookies Policy.