Aliving room is shaped like a pentagon. a carpenter wants to put a triangular shelf in the corner marked on the diagram. the sum of the interior angles of a pentagon is 540°. which statement is correct?

a.) the shelf angle is too small because the corner is more than 70°.
b.) the shelf angle is too big because the corner is less than 70°.
c.) the shelf will fit exactly because the corner is 70°.
d.) it cannot be determined if the shelf will fit in the corner.