Answer:

Explanation:
we know that
The radii divide the pentagon into five isosceles triangles each with a center angle of 360/5 = 72 degrees
so
The area of the regular pentagon is equal to the area of one isosceles triangle multiplied by 5
step 1
Find the area of one isosceles triangle
Applying the law of sines

step 2
Find the area of the regular pentagon

Round to the nearest whole square inch
