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Question

The sum of all the angles of a pentagon are

A
360o
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B
540o
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C
720o
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D
none of these
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Solution

The correct option is B 540o

ABCDE is a pentagon.
We know that pentagon has 5 sides, so n = 5
Sum of interior angles of pentagon ABCDE = (n-2)×180
(5 - 2)×180 = 540
sum of all angles of a pentagon is 540


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