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2014-07-08T23:59:12+03:00
AAMB=30*30/2=450
AAMCG=30*30=900 (AMCG patrat)
ABCD paralelogram, GC=30, AD=BC=60, deci GD=30
EFCD trapez
AEFCG=(10+70)*30/2=1200
Apoligon=AAMB+AAMCG+AEFCG=2550 km ²
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