declare

  a int:=4;

  b int:=6;

  hypo float;

  peri float;

  begin

  hypo:=sqrt(a*a+b*b);

  peri:=a+b+hypo;

  dbms_output.put_line('perimeter of right angle triangle is'||peri);

  end;

  /

Output:

perimeter of right angle triangle is17.2111025509279785862384425349409918925