If each angle of a triangle is less than the sum of the other two, show that the triangle is acute angled.

Explanation

Solution:
Let '/_AAdding '/_A' on both sides, we get,
'2/_A Similarly, we obtain '/_B<90@ ' and '/_C<90@'Each angle of the triangle is less than '90@'
Hence,it is an acute-angledtriangle.