Question 852691
<pre>
Use the formula

{{{(matrix(10,1,
The,sum, of, the, interior, angles, of,any,n-sided,polygon))}}}{{{""=""}}}{{{(n-2)*"180°"}}}

substituting 5 for n to calculate the sum, then write the sum of the
5 given interior angles and set it equal to that value:

a+2a+3a+4a+5a = {{{(matrix(10,1,
The,sum, of, the, interior, angles, of,the,5-sided,polygon))}}} 

Then solve that equation for "a".

Then after getting "a", the second smallest angle will be "2a°.

Edwin</pre>