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P= 1/2*6cm*8cm
P= 3m*8cm
P= 24cm2
a= 20cm:4
a= 5cm
P=a*h
24cm2=5cm*h
h= 24cm:5cm
h= 4.8cm
Odp. Pole tego rmbu wynosi 24cm2, a wysokość 4.8cm
;DD
L= 20cm
a= 20 : 4 = 5cm
h = 24 : 5 = 4,8cm
Pr - pole rombu
L - obwód
a - bok
h - wysokość robmu