Question
A polygon has 20 diagonals .how many sites it have?
ans 8 BUT HOW DO WE GET IT
ans 8 BUT HOW DO WE GET IT
Answers
Ms. Sue
http://www.mathsisfun.com/geometry/regular-polygons.html
Hamza
Even i don't know but just memorize the formula n(n-3)/2 = No of diagonals.
Where n is the number of sides
Where n is the number of sides