Hỏi hình ne'''''''''''

H

huong3498

T

thutuanprocute

Giải​
Cau tu ve hinh nhe;
Xet hinh thoi ABCD co goc BAD = 60;SABCD=8*can 3
Noi B voi D ta co tam giac ABD deu .dat AB=a suy ra
S tam giac ABD=(a^2*can 3)/4 suy ra SABCD=(a^2*can 3)/2=8*can 3 suy ra a^2=16 suy ra a=4 suy ra CABCD=4*4=16
Nho phai cam on day nhe co bai nao kho cu post len cho thutuanprocute la xong ngay:khi (164)::khi (132)::khi (80):


 
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