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h - 3cm × 2 = 6cm
P = 1/2 × a × h
P = 1/2 × 3cm × 6cm
P = 9cm²
wysokość 3x2=6
P=1/2 6x3
P=3x3
P=9cm²
Podstawa -3 cm
wysokosc= 3cm -2 =6cm
1/2 × 3cm x6cm
odp.9