Răspunsuri

2014-08-25T12:23:23+03:00
Ad=ab*2=107*2=214
Suma laturilor=2*107+2*214=642
Jumatatea sumei=642/2=321
4 3 4
2014-08-25T14:02:26+03:00
AB=CD=107
AD=BC=107x2=214
214+214+107+107=642
642:2=321
7 4 7