В) P=b+a+(b-c)+d+c+(a-d)=b+a+b+a=2a+2b
S=a*b-c*d
Г) P=a+b+c+d+(a-c)+(b-d)=a+b+a+b=2a+2b
S=a*b-d*(a-c)
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В) P=b+a+(b-c)+d+c+(a-d)=b+a+b+a=2a+2b
S=a*b-c*d
Г) P=a+b+c+d+(a-c)+(b-d)=a+b+a+b=2a+2b
S=a*b-d*(a-c)