How many diagonals can be drawn by joining the vertices of an octagon? – InterviewSolution

InterviewSolution

1.

How many diagonals can be drawn by joining the vertices of an octagon?1. 202. 243. 284. 64

Answer» Correct Answer - Option 1 : 20

Concept used :

Number of diagonals in polygon = [n(n - 3)]/2 (where n is the number of sides)

Calculations :

Here n will be 8 as octagon has 8 sides.

Number of polygons in octagon = [8 × (8 - 3)]/2

⇒ (8 × 5)/2

⇒ 40/2 = 20

∴ Option 1 will be the right choice.

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