Cross multiply for x.
<span>1/48 = 28/x </span>
<span>x = 1,344 inches = 112 feet</span>
The sum of the measures of the interior angles of a polygon of n sides is
180(n - 2)
If the polygon is regular, all angles are congruent, and each angle measures
[180(n - 2)]/n
Set the measure of one angle equal to 140, and solve for n, the number of sides.
[180(n - 2)]/n = 140
180(n - 2) = 140n
180n - 360 = 140n
40n = 360
n = 9
The number of sides is 9.
D. It is a convex pentagon because it has five sides and none of the sides would extend into the inside of the polygon.
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