0
In short:
The Pentagon
In Long:
The formula for the number of diagonals is
(x*(x-3))/2
So if you make that equal to x you get 5.
(x(x-3))/2=x
(x^2-3x)/2=x
x^2-3x=2x
x^2-5x=0
x=0 or x-5=0
x=0 or x=5
x=5
Because there is no polygon with 0 sides and the pentagon is defined as a polygon with 5 sides, the pentagon is the only regular polygon with the same amount of diagonals as it has sides.
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Does a polygon have more angles or sides explain?
A polygon has exactly the same number of both internal and external angles to the number of sides. Assuming external angles count, there are two times the number of sides as the total number of angles
What relationship exist between the number of sides on a regular polygon and the number of lines of symmetry?
They are the same.
What is a polygon with all sides the same length and all angles the same measure called?
A polygon with all sides the same length and all angles the same measure is called a regular polygon. Examples include triangles, squares, pentagons, and hexagons. When the number of sides approaches infinity, the shape of a circle is formed.
How many straight lines is formed for a polygon?
It depends. A polygon can have any number of sides, in the same way as a circle can have any radius.
Polygon with sides and angles that are not congruent?
a polygon with 4 right angles and 4 sides of the same length
