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If the sum of all interior angles of a convex polygon is 1440o, then the number of sides of the polygon is?

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8

10

11

12

answer is B.

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Detailed Solution

Concept- In the above given question , to find the number of sides of a polygon we use the formula for sum of all interior angles of a polygon of n sides.
Sum of all the angles of the given polygon

Sum of all the angles of

sided polygon

Given, sum of all angles

Therefore, the number of sides of the given polygon is 10 .
Hence, the correct answer is option 2.

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