DIAGONALS The line segments obtained by joining vertices which are are not adjacents are called the diagonals of the polygon.

No of diagonals of a 12 sided polygon are

Prove that the line segment obtained by joining the midpoints of the diagonals of a trapezium is parallel to the parallel sides of the trapezium.

Which of the following cannot be number of diagonals of a polygon

in the given square,a diagonal is drawn,and parallel line segments joining points onthe adjacent sides are drawn on both sides of the diagonal.The length of the diagonal n sqrt(2)cm. If the distance between consecutive line segments be (1)/(sqrt(2))cm, then thesum of the lengths of all possible line segments and the diagonal is:

Draw an octagon ABCDEFGH and name all the sides, adjacent sides and vertices as well as the diagonals of the polygon.

The number of diagonals that can be drawn by joining the vertices of a heptagon

Diagonal joins any two adjacent vertices of a polygon .