Contact us
Choose a category below so we can get back to you as quickly as possible.
菱形邊長為16÷4=4cm, 由∠A=30°,∴高為4÷2=2, S=4×2=8(cm²;).
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.