Each diagonal runs from one corner of the shape to an opposite corner, so each diagonal requires 2 corners. So in a hundred cornered shape there will be half of a hundred diagonals, which is 50. Just divide the number of corners by 2. So for a hexagon, which has 6 sides and 6 corners, there are 3 diagonals.
You connect the points that it has, corner to corner and count them. Moo
Trace from each corner to each other corner that it is not directly connected to. count the number of lines within the shape.
Any quadrilateral (4-sided shape) has 2 diagonals.
The 'long' diagonals are those two that run from one corner square diagonally across the board to the square in the opposite corner. They are the diagonals a1-h8 & h1-a8.
35 diagonals
Draw a line from one corner to its opposite corner. Repeat with the other two corners. The diagonals should be perpendicular to each other.
You would make a line from one corner to another corner than if you want to know the measure of it you would take a ruler and measure it.
There are 54 diagonals in a 12 sided shape
There is none. A 5 sided shape is a pentagon but that has 10 diagonals, not 2.
A convex shape.
Two features of a rhombus are it is a quadrilateral shape because it has 4 sides which are equal in length and it has no corner right angles but its diagonals are perpendicular.
octagon