2
the answer would be 2
There are 35 diagonals inside a decagon
7
A heptagon has 4 diagonal lines and 7 sides and it has 2 congruent diagonal lines and 2 congruent triangles
There are four diagonal lines in a hexagon.
A square has four lines of symmetry. These consist of two diagonal lines and two lines that bisect the square horizontally and vertically. Each line of symmetry divides the square into two identical halves that are mirror images of each other.
4 (1 horizontal: left to right, 1 vertical: up and down and 2 diagonal)
Four.
Diagonal lines are used for many things like art and designs. They can be used for buildings.
zero
it has 4 :)
4