50 points I WILL ALSO MARK BRAINLIEST ITS TIMED PLZ HURRY

The coordinates of the vertices of a polygon are shown on the graph below.

On a coordinate plane, point A is at (negative 4, 3), point C is at (0, negative 3), and point B is at (negative 4, negative 3).
What is the name of the polygon?
octagon
pentagon
quadrilateral
triangle