b= 24cm
a=24cm-4cm- 4cm
a=16cm
56cm- (24cm+ 16cm)= 56cm- 40cm= 16cm
c= 16cm:2
c=8cm
h=a
P= 1/2* (a+b)*h
P=1/28 (16cm+24cm)*16
P=240cm kwadratowych
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b= 24cm
a=24cm-4cm- 4cm
a=16cm
56cm- (24cm+ 16cm)= 56cm- 40cm= 16cm
c= 16cm:2
c=8cm
h=a
P= 1/2* (a+b)*h
P=1/28 (16cm+24cm)*16
P=240cm kwadratowych