Question 14
What is the sum of all the angles of a pentagon?
a) 180∘
b) 360∘
c) 540∘
d) 720∘
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Solution
We know that, the sum of angles of a polygon =(n−2)×180∘, where n is the number of sides of the polygon. In pentagon, n = 5 ∴Sum of the angles =(n−2)×180∘ =(5−2)×180∘ =3×180∘ =540∘