How many corners does a nonagon have?
A nonagon has nine sides, nine angles and nine corners (vertices).
Nonagon is a noun referring to a polygon with nine sides and nine angles (corners). Here are example sentences: "At first glance, people might not distinguish between a nonagon and a decagon." "Traffic signs come in various shapes, such as an octagon for the stop sign, but they do not come in the shape of a nonagon.