The word is heptagon. A heptagon has 7 sides and 7 corners. If you join corners by straight lines from one corner to another corner you will find 5 triangles, but if you join all corners to a point in the centre you will find 7 triangles. The Heptathlon in athletics is a contest in which the participants must compete in 7 different athletic forms of athletics.
A nine sided shape has 7 triangles
9-2 = 7 triangles
7
If only 7 are colinear, then the question implies the lines need not go through every point. In that case there is an infinity of lines for each point.
The word is heptagon. A heptagon has 7 sides and 7 corners. If you join corners by straight lines from one corner to another corner you will find 5 triangles, but if you join all corners to a point in the centre you will find 7 triangles. The Heptathlon in athletics is a contest in which the participants must compete in 7 different athletic forms of athletics.
A heptagon has 4 diagonal lines and 7 sides and it has 2 congruent diagonal lines and 2 congruent triangles
7 triangles
There are 7 triangles in a nonegon
You did not specify if these are straight lines. If the lines are straight then no, only 7. If you curve the lines then, yes.
It can have 5 triangles
A nine sided shape has 7 triangles
9-2 = 7 triangles
7
If only 7 are colinear, then the question implies the lines need not go through every point. In that case there is an infinity of lines for each point.
It can form 7 triangles
7