Question

Help cu 10,11,12 va rog!

Answer 1

10. Perim.ABCD=AB+BC+CD+AD

36=8+10+CD+10

CD=36-28 , CD=8

AB=CD=8 , BC=CD=10 => ABCD=paralelogram

11.La fel ca si 10

12.ADC=120

DAB=x

ABC=y

ABC=2x , BCD=DAB=>ADC+DAB+ABC+BCD=360

120+4x=360=> x=60=DAB => ABC=120 , BCD=60 =>ABCD=paralelogram