quadrilateral
nonagon
Apothem!
Apothem.
Apothem.
Apothem
square
A perpendicular diagonal is a pair of segments or lines that cross a polygon making a perpendicular
Squares.
quadrilateral
quadrilateral has perpendicular lines
apothem
nonagon
Apothem!
Apothem.
It is a rhombus.
Apothem.