Question

Calculati aria unui romb ABCD ,stiind ca AB =10 m si AC =120 dm.​

Answer 1

construim BO perpendicular pe AC

=>Triunghiul AOB cu m(O)=90°

AO=AC/2

AO=120/2=60dm=6cm

=>BO^2=AB^2-AO^2

BO^2=100-36

BO^2=64=>BO=8cm

=BD=2BO=16cm

=>A=(BD×AC)/2

A=(16×12)/2

A=192/2

=>A=96cm^2

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