Theory:

We know that anything congruent is equal. Unequal things exhibit a property called inequalities.
Example:
Let us look at some examples of inequalities.
 
1. Two unequal lines
 
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2. Two unequal angles
 
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3. Two unequal boxes
 
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In this chapter, we will deal only with inequalities in triangles.
 
Let us look at a few theorems on inequalities in triangles.
Theorem 6
If two sides of a triangle are unequal, the angle opposite to the longer side is larger (or greater).
Theorem 7
In any triangle, the side opposite to the larger (greater) angle is longer.
Theorem 8
The sum of any two sides of a triangle is greater than the third side.