it has 4 :)
A heptagon has 4 diagonal lines and 7 sides and it has 2 congruent diagonal lines and 2 congruent triangles
14
14.
sevenImproved Answer:-14 diagonals
A 7 sided heptagon has 14 diagonals
A heptagon s bounded by seven straight sides.
A heptagon contains zero parallel lines. All of the lines in a regular heptagon with all sides and angles equal are at different angles from each other.
An irregular 7 sided heptagon normally has no lines of symmetry depending how it is constructed.
Seven.
There are four diagonal lines in a hexagon.
It has 7 lines of symmetry
In a regular heptagon, there are 7 lines of symmetry because there is one line of symmetry for every side.