There are 35 diagonals inside a decagon
170 diagonals
2
A decagon has 35 diagonals
their would be still 2 diagonal lines * * * * * There are 8*(8-3)/2 = 8*5/2 = 20 lines joining two vertices. That being the conventional definition of a diagonal, there are 20 diagonals.
65. The equation to figure the number of diagonal lines for any polygon is n(n-3)/2. n= number of vertices
a stupid shape
To determine the number of lines of symmetry in a figure, you need to analyze its shape. A figure can have multiple lines of symmetry, such as vertical, horizontal, or diagonal lines, depending on its symmetry properties. For example, a circle has infinite lines of symmetry, while a rectangle has two. If you provide a specific figure, I can give a more precise answer.
a Pentagon has 5 diagonals, they form a star inside the polygon
No because diagonal lines do not count. Even though they might fit perfectly inside the rectangle, but those don't count. Only lines going horizontally or vertically count as lines of symmetry. :)
diagol lines a slanted linesA diagonal line is a lines which is a slanted line
A heptagon has 4 diagonal lines and 7 sides and it has 2 congruent diagonal lines and 2 congruent triangles
Because the lines between each vertice of the figure are already drawn.