reserve p,p1,p2,p3,p11,p22,q,q1,q2 for Point of TOP-REAL 2,
  f,h for FinSequence of TOP-REAL 2,
  r,r1,r2,s,s1,s2 for Real,
  u,u1,u2,u5 for Point of Euclid 2,
  n,m,i,j,k for Nat,
  N for Nat,
  x,y,z for set;

theorem Th2:
  (p1+p2)`1 = p1`1 + p2`1 & (p1+p2)`2 = p1`2 + p2`2
proof
  p1 + p2 = |[ p1`1 + p2`1, p1`2 + p2`2]| by EUCLID:55;
  hence thesis;
end;
