Răspunsuri

2014-10-01T13:52:46+03:00
Vezi figura atasata.
Daca AC_|_AD , si m(<D)= 60
in ΔADC,
cos <ADC=AD/CD
1/2=6/CD
=> CD=12
Daca AD=BC si CD=AB=>
Perimetru ABCD=AB+BC+CD+AD=6+12+6+12=36