This programme will check whether the 3 sides a,b,c of given length will form a Triangle or not ... First we will calculate s=(a+b+c)/2 where a,b,c are the length of given three lines.. Then s(s-a)(s-b)(s-c) then the square root of this . From this we will find Each Angle of supposed triangle. Then we will find a/Sin(A) ,b/sin(B) and c/sin(C) If all are equal then "The 3 lines of lenth a,b,and c