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un triunghi isoscel are baza 12cm, si perimetru 32cm .calculati lungimile celorlate laturi

Răspuns :

AB=AC = (32-12):2 = 20 :2 - 10 cm fiecare
[tex] P_{t} =32cm[/tex]
[tex]c=12cm[/tex]
[tex]a+b= P_{t} -c[/tex]
[tex]a+b=32-12=20[/tex]
[tex]a=b=(a+b):2[/tex]
[tex]a=b=20:2=10cm[/tex]