Contact us
Choose a category below so we can get back to you as quickly as possible.
圓的半徑R,正方形的邊長x πR²;=x²;√πR=x 4√πR=4x 2πR-4x=2πR-4√πR=R(2π-4√π) ∵2π
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.