4.Oblicz pola poniższych trzech figur.
Zad. w załączniku.Proszę odpowiedz!
a)
(4dm*2dm)/2=4dm2 (3dm*2dm)/2=3dm2 (2dm*2dm)/2=2dm2
P=4dm2+3dm2+2dm2=9dm2
b)
(10cm*5cm)/2=25cm2
P=4*25cm2=100cm2
c)
(5m*5m)/2=12,5m2 (1m*1m)/2=0,5m2
P=12,5m2-0,5m2=12m2
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a)
(4dm*2dm)/2=4dm2 (3dm*2dm)/2=3dm2 (2dm*2dm)/2=2dm2
P=4dm2+3dm2+2dm2=9dm2
b)
(10cm*5cm)/2=25cm2
P=4*25cm2=100cm2
c)
(5m*5m)/2=12,5m2 (1m*1m)/2=0,5m2
P=12,5m2-0,5m2=12m2