What is the sum of the interior angles of a regular polygon with 5 sides?
a) 1,080°
b) 900°
c) 720°
d) 540°
The sum of the interior angles of a regular polygon can be found using the formula (n-2) * 180°, where n is the number of sides of the polygon.
In this case, the regular polygon has 5 sides, so the sum of the interior angles is (5-2) * 180° = 3 * 180° = 540°.
Therefore, the correct answer is d) 540°.