less than 90 degrees
It is a perpendicular line that forms a right angle at the point of intersection.
It is the point of intersection of its three main diagonals.
The point of concurrency is the point intersection.
Make a pentagon, and draw lines from each point to each other point. That would give you a five-pointed star within a pentagon. Plant the cabbages on the 5 vertices of the pentagon, and on the five points where the internal lines (the diagonals) cross.Make a pentagon, and draw lines from each point to each other point. That would give you a five-pointed star within a pentagon. Plant the cabbages on the 5 vertices of the pentagon, and on the five points where the internal lines (the diagonals) cross.Make a pentagon, and draw lines from each point to each other point. That would give you a five-pointed star within a pentagon. Plant the cabbages on the 5 vertices of the pentagon, and on the five points where the internal lines (the diagonals) cross.Make a pentagon, and draw lines from each point to each other point. That would give you a five-pointed star within a pentagon. Plant the cabbages on the 5 vertices of the pentagon, and on the five points where the internal lines (the diagonals) cross.
Intersection...?
vertex
vertex
Incenter
angle
It is the incentre.
point of intersection of the sides of the angle; the vertex
Yes, rotational symmetry of order 2.