Question 933406
Two side of a triangle have the same length. 
<pre>
Let the two sides that are equal in length have length x.
</pre>
The third side is 20 cm longer than each of the other sides.
<pre>
So the three sides have lengths x,x,x+20 centimeters.
</pre> 
The perimeter is no less than 95 cm
<pre>
perimeter = (x)+(x)+(x+20) = 3x+20 &#8807; 95
                                3x &#8807; 75
                                 x &#8807; 25 cm

The triangle inequality says the sum of two sides with minimal
lengths is strictly greater than the third side:

x+x > x+20   
 2x > x+20
  x > 20 cm

That requirement is fulfilled by x &#8807; 25

The two sides that are equal in length have length x &#8807; 25 cm.
The third side is exactly 20 cm more than x.  So it must be
45 cm or longer.

Edwin</pre>