\(OA=\sqrt{\dfrac{50.24}{3.14}}=4\left(cm\right)\)
=>AC=BD=8cm
\(AB=4\sqrt{2}\left(cm\right)\)
\(S_{ABCD}=\left(4\sqrt{2}\right)^2=32\left(cm^2\right)\)
Đúng 0
Bình luận (0)