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Question

The sum of all the angles of a triangle is _____ .


  1. 180

  2. 90

  3. 270

  4. 360


Solution

The correct option is A

180


Factual: Sum of the angles of the triangle is 180

We have learned that for any polygon, the sum of its interior angles is

(n2)×180

where n is the number of sides

For the triangle, n = 3

So, sum of all interior angles =  (32)×180

= 180

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