Question

Total no diagonals in decagon?

Answer 1

Given:

Decagon

To Find:

No of diagonals

Solution:

Formula = n(n-3) / 2

So, no of diagonals = 10 (7) / 2 = 35.

Answer 2

Answer:

35

Step-by-step explanation:

To find the diagonal use the formula = n(n-3)/2

n = number of sides

decagon has 10 sides

So 10(10-3) /2

 ⇒10 × 7/2

  ⇒70/2

Ans⇒ 35

Hope this will help you