Contact us
Choose a category below so we can get back to you as quickly as possible.
設菱形的兩條對角線長為b,c 因為c把菱形分成兩個全等三角形,又b垂直於c,所以S菱形=2×S三角形=(1/2)bc
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.