There are 170 diagonals
Wiki User
∙ 2012-11-09 14:04:25Diagonals connect corners of a figure. If you try to connect two corners of a three sided figure, the lines you draw will exactly mimic the sides of the figure. Because of this, a three sided figure has no diagonals.
0.5*(162-48) = 104 diagonals
0.5*(252-75) = 275 diagonals
A 4 sided quadrilateral has 2 diagonals.
9
7
54
90
1/2*(152-45) = 90 diagonals
There are 27 diagonals
A pentagon is a 5 sided figure.
If the diagonals are cong. then the figure is a rectangle.