Odpowiedź:
P=(a+b) *h:2= (8cm+6cm)*3:2= 14*3:2= 42:2=21cm2
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Odpowiedź:
P=(a+b) *h:2= (8cm+6cm)*3:2= 14*3:2= 42:2=21cm2
a= 6
b= 8
h = 3
Pole= (6+8) x 3 : 2 =
14 x 3 :2 = 41:2 = 21 cm2