Obw= 4+5+3+6= 18cm
P=(a+b)*h/2= (3+6)*4cm/2= 9*4/2= 36cm/2= 18cm2^
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Obw= 4+5+3+6= 18cm
P=(a+b)*h/2= (3+6)*4cm/2= 9*4/2= 36cm/2= 18cm2^
P=3+6•4:2
P=3+24:2
P=3+12
P=15
Obw=4+5+3+6
Obw=18cm