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//se citesc coordonatel a b c d care reprezita varfurile unui treptungi

//sa se calculeze perimetru aria si diagonala

#include<iostream.h>

#include<math.h>

struct fractie

{int x,y;};

fractie a,b,c,d;

void main()

{int l1,l2,p,aria;

float drep;

cin>>a.x>>a.y;

cin>>b.x>>b.y;

cin>>c.x>>c.y;

cin>>d.x>>d.y;

l1=d.y-a.y;

l2=b.x-a.x;

p=l1*2+l2*2;

aria=l1*l2;

drep=sqrt(l1*l1+l2*l2);

cout<<l1<<endl;

cout<<l2<<endl;

cout<<"aria="<<aria<<endl;

cout<<"perimetru="<<p<<endl;

cout<<"diagonala="<<drep;