To find the answer,we need to first find the total value of the sum of interior angles:
[tex](n - 2) \times 180[/tex]
Where n is the sides of polygon.
The sum of interior angles in this case:
(5-2)×180°
=3×180°
=540°
We can then proceed to find the answer by putting the sum of interior angles into the equation:
90°+107°+144°+138°+x° = 540°
x = 540-90-107-144-138
x = 61
Therefore, x=61.
Hope it helps!
