Question

The number of diagonals in a decagon is​

Answer 1

Answer:

35

Step-by-step explanation:

because each diagonal has been counted twice (once starting with one of its ends and one starting with the other.) There are therefore ½ of 70, i.e. 35 diagonals in a decagon. Generally, a polygon with n sides has ½n(n-3) diagonals: none for a triangle, 2 for a quadrilateral, 5 for a pentagon, 9 for a hexagon etc.

Answer 2

35..

Mark me brainliest plzz..❤❤✌✌❤✌❤☺