Contact us
Choose a category below so we can get back to you as quickly as possible.
雙曲線a=4 AF2-AF1=2a=8 BF2-BF1=2a=8 AF1+BF1=5 周長=AF2+BF2+AB =AF2+BF2+AF1+BF1 =AF2-AF1+BF2-BF1+2(AF1+BF1) =8 +8 - 2*5 =6
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.