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What will be the sum of internal angles of a septagon?

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in Mathematics – Class 8 by (91.0k points)
What will be the sum of internal angles of a septagon?

(a) 650

(b) 700

(c) 450

(d) 900

The question was posed to me in an online quiz.

The origin of the question is Properties of Polygons-1 topic in portion Quadrilaterals of Mathematics – Class 8

1 Answer

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Best answer
The correct choice is (d) 900

To elaborate: The sum of the interior angles of a polygon can be calculated using the formula = (number of sides – 2) × 180

Here, number of sides is 7.

So, the sum of interior angles of a septagon = (7 – 2) × 180 = 5 × 180 = 900

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