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Deducing a Formula for Sum of Interior Angles of a Polygon

Question 69Fi...

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Question 69
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The sum of interior angles of a polygon of n sides is ___ right angles.

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Solution

(2n - 4)
By the formula, sum of interior angles of a polygon of n sides $= (n - 2) \times 180^{\circ}$
$= (2 n - 4) \times 90^{\circ}$ .

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Deducing a Formula for Sum of Interior Angles of a Polygon

Standard VIII Mathematics

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