The hexagon has six corners and six sides.
Chat with our AI personalities
The corner on a shape where edges meet is called a vertex.
a vertex
Many 3d shapes have a corner.
A shape with one corner is a triangle. Yes, I know, technically it has three sides, but it only has one corner. So, there you have it, a triangle is the shape you're looking for.
Triangle means 3 angles. No other shape exists and any three angle shape is a triangle