Bạn tự vẽ hình nha
\(S_{ABCD}=6^2=36\)
\(S_{ABE}=\dfrac{AB.BE}{2}=\dfrac{6.2}{2}=6cm^2\)
\(S_{ADF}=\dfrac{AD.DF}{2}=\dfrac{6.2}{2}=6cm^2\)
\(S_{EFC\:}=\dfrac{EC.FC}{2}=\dfrac{4.4}{2}=8cm^2\)
\(\Rightarrow S_{AEF}=S_{ABCD}-S_{ABF}-S_{ADF}-S_{EFC\:}=36-6-6-8=16cm^2\)
Đúng 0
Bình luận (0)
ta có SABCD= 6*6=36
SABE=6*2/2=6
SECF=4*4/2=8
SADF=6*2/2=6
SAEF=SABCD-SABE-SECF-SADF=36-6-8-6=16
Đúng 0
Bình luận (0)
