A diagonal line of a polygon is a line that joins any two vertices not already joined by a side.
A polygon with n sides has n(n-3)/2 diagonals
→ an octagon has 8(8-3)/2 = 8 × 5 ÷ 2 = 20 diagonals
A regular octagon has 8 lines of symmetry.
A regular octogon has 8 lines of symmetry. * * * * * An irregular octagon can have 0, 2 or 4.
There are eight lines of symmetry.
yes
An octagon had four pairs of parallel lines.
4
neff
There are 20 diagonals in an 8 sided octagon
yes, diagonal to the right and left, horizontal, and vertical.
Assuming thatdiangle = diagonalsemetry = symmetryoctigon = octagonthe answer is 0, 1, 2, 4 or 8.
An octagon had four pairs of parallel lines.
An octagon has 8 lines of reflective symmetry.
An octagon is an eight-sided figure.
A heptagon has 4 diagonal lines and 7 sides and it has 2 congruent diagonal lines and 2 congruent triangles
To find interior angle measurements, you must divide the shape into triangles by drawing diagonal lines. The diagonal lines draw triangles, and the interior angle measure of triangles are always 180 degrees. The sum of interior angles of an octagon is 1080 degrees. How ever many triangles you have, multiply it by 180. See octagons in the link for more help,
There are four diagonal lines in a hexagon.
Because it complies with the formula: 0.5*(n2-3n) = number of diagonals An octagon has 8 sides and so: 0.5*(64-24) = 20 diagonals