# How many diagonals does a decagon has

A diagonal joins a vertex to one of the vertices that do not include that vertex itself and the immediately adjacent vertices. So: for each vertex there are seven. However, as you said, consecutive vertices will not give a diagonal, so we ignore the I have trouble telling what you're doing in your answer; you seem to fix a. A decagon has 10 vertices, by definition (deka is Greek for 'ten'). Generally, a polygon with n sides has ½n(n-3) diagonals: none for a triangle, 2 for a quadrilateral, 5 for a All of that personal information should be private, but on Google i.

If you wanted to know how many diagonals were present in a square, you would start by drawing the square. The easiest way to Due to the shape of the triangle , it does not have any diagonals. 2 For example: A dodecagon has 12 sides. We'll go with a polygon that has 8 sides (which is called an octagon), like this: Now, this How many diagonals can you draw in an octagon, that all begin at one vertex? You could draw diagonals from any vertex, right?. the number of diagonals in a polygon are given by the equation: (n * (n-3))/2 for your decagon, the number of sides is equal to this makes the formula.

A decagon has 35 diagonals regardless of whether it is a regular or irregular polygon. This can be determined by using a simple formula that applies to polygons. a) How many diagonals does a regular hexagon have? (Draw them.) of diagonals for a regular dodecagon (a sided polygon), using the pattern in the table.