A regular hexagon
a hexagon ( triangle has 3 and a hexagon has 6)
A figure with twice as many sides as a triangle is a hexagon. A triangle has 3 sides, so double that would be 6 sides. A hexagon is a polygon with 6 sides and 6 angles. It is a regular polygon with all sides and angles congruent.
hexagon
octagon-8 sides
An heptagon has 7 sides and 14 diagonals
A hexagon and a triangle.
a hexagon
A regular hexagon
a hexagon ( triangle has 3 and a hexagon has 6)
A figure with twice as many sides as a triangle is a hexagon. A triangle has 3 sides, so double that would be 6 sides. A hexagon is a polygon with 6 sides and 6 angles. It is a regular polygon with all sides and angles congruent.
hexagon
A 7 sided polygon has 14 diagonals
square
octagon-8 sides
An heptagon has 7 sides and 14 diagonals
69
In a polygon with n sides, we have n(n-3)/2 diagonals. In a convex polygon with n sides, you can draw n-3 diagonals from each vertex, but you are counting each one twice you so you need to divide by do. That is why we have n(n-3) divided by 2