<h3><u>Solution:- </u></h3>
<u>In </u><u>the </u><u>given </u><u>polygon-</u>
>>Two of the angles are of 90⁰
<u>The sum of all angle in n-sided polygon is given by -</u>
Here number of sides,n = 8
So ,the sum of all angle =
<u>>>Since two of the angles are of 90⁰ ,let's subtract them from total angle sum to get angles in term of only.</u>
Now, Sum of remaining 6 angles = 6
Also, 6 = 900⁰