Contact us
Choose a category below so we can get back to you as quickly as possible.
假設圓的周長和正方形的周長是12.56釐米,則正方形的邊長a=c÷4=12.56÷4=3.14(釐米),正方形的面積S=a2=3.14×3.14=9.8596(平方釐米);圓的半徑r=C÷2π=12.56÷(2×3.14)=2(釐米),圓的面積S=πr2=3.1…
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.