Care este formula de calculare a ariei patratului? , 4•a, A+b+c, a², L•l, Cate grade are unghiul nul?, 180, 0, 90, 90>d<0, Care este formula pentru perimetru triunghiului?, a+b+c, 4•a, 2(L+l), Cum se notează semidreapta?, OA], [OA], (OA, [OA, Care este diferită dintre dreapta si segment ?, Dreapta are inceput,dar segmentul nu, Segmentul are inceput si sfarsit, dar dreapta nu are nici inceput nici sfarsit.

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