If the sum of interior angles of a polygon is 900°, then the it is a ___.

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Solution

The correct option is D
Sum of interior angles of a polygon with n-sides = $(2 n - 4) \times 90 °$

$(2 n - 4) \times 90 °$ = 900°

2n - 4 = 10

2n = 14

n = 7

Hence the polygon is a septagon.

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