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2.pole 240m 2
pole rombu
e-przekatna krótsza
f-przekatna dłuzsza
pole
e*f /2 =
24*10/2 = 240/2 =120 pole rombu
p = a× h
P= 10 × 3 = 30 cm ²
Obw.= 20+12=32 cm
2.p= 24 × 10×½
p= 120 cm²