Which of these statements is true? A. The interior angles of both a regular and irregular pentagon have a sum of 540o. B. The in
terior angles of both a regular and irregular pentagon have a sum of 1,080o. C. Only a regular pentagon’s interior angles have a sum of 540o. D. Only an irregular pentagon’s interior angles have a sum of 540o.
The sum of the interior angles of a hexagon is 720 degrees, and there are two right angles. The sum of the known angles is 573, so 720-573 is 147. Pick c.