square
Yes
Square, rhombus and a kite
A square, a rhombus and a kite all have diagonals that are perpendicular and meet each other at right angles.
Yes, the diagonals of a square are congruent (equal in length) and are perpendicular.
False maybe
A square - or rectangle.
Any quadrilateral (4-sided shape) has 2 diagonals.
35 diagonals
There are 54 diagonals in a 12 sided shape
There is none. A 5 sided shape is a pentagon but that has 10 diagonals, not 2.
A convex shape.
octagon