Răspunsuri

2014-05-24T15:24:04+03:00
A) daca perimetrul este 30, l=30:3=10 dm
h²=l²-(l/2)²=10²-5²=100-25=75
h=5√3
b)ap=l√3/6=10√3/6=5√3/3 dm
c)A=10.5√3/2=25√3 dm²

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