Question

Polygon A B C D E has 5 sides.
Which is a correct description of the polygon?

It is a concave pentagon because segment AE would extend into the inside of the polygon, and it has five sides.
It is a convex hexagon because it has six sides and none of the sides would extend into the inside of the polygon.
It is a concave hexagon because segment AE would extend into the inside of the polygon, and it has six sides.
It is a convex pentagon because it has five sides and none of the sides would extend into the inside of the polygon.

Answer 1

Answer: It is a concave pentagon (first choice).

Reason: ABCDE has five vertices so it’s a pentagon. Because the segment AE would lie inside (showing a reflex interior angle), the polygon is concave.