IP. ΔABC
[AB]≡[BC] =325 m +325m= 650 m
PΔABC=850 m
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C: [AC]=?
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Dem.
PΔABC=850 m
[AB]+[BC]=325+325 = 650 m
850m=650m +[AC]
[AC]=850 m - 650m
[AC]=200m
verificare: 325m + 325m + 200m = 850m
850m = 850 m (PΔAB)