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
→ a decagon has 10(10-3)/2 = 10 × 7 ÷ 2 = 35 diagonals
A decagon need not have any lines of symmetry. It can also have 1 or 10 lines of symmetry.
A decagon need not have any lines of symmetry. It can have 10.
Ten.
An irregular decagon has no lines of symmetry. Unlike a regular decagon, which has 10 lines of symmetry due to its equal sides and angles, an irregular decagon lacks uniformity in its shape, meaning that it cannot be divided into identical halves by any line. Therefore, it generally has zero lines of symmetry.
A decagon is a 10 sided polygon Exterior angles add up to 360 degrees Interior angles add up to 1440 degrees It has 35 diagonal A decagon can have a regular or an irregular shape
A decagon has 35 diagonals
There are 35 diagonals inside a decagon
35 diagonals
A decagon need not have any lines of symmetry. It can also have 1 or 10 lines of symmetry.
A decagon need not have any lines of symmetry. It can have 10.
A regular decagon would have five sets or parallel lines.
10 lines of symmetry
10
A heptagon has 4 diagonal lines and 7 sides and it has 2 congruent diagonal lines and 2 congruent triangles
There are four diagonal lines in a hexagon.
10
The answer is 24.