Atriangle has a side length of 3/4 inch and a side length of 3 inches. what could be the length in inches of the thrid side of the triangle?

We know that
The triangular inequality establishes that: 
The sum of the lengths of any two sides of a triangle is greater than the third
side
therefore
if
a=3/4 in> 0.75 in
b=3 in
c= third side of triangle
 (a+b) > c
(3+0.75) > c
3.75 > c> c < 3.75 in
so

the answer is
the length in inches of the third side of the triangle must be minor a 3.75 in

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