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# Let’s write the sum of the measurement of the interior angles of the following polygons:

octagon

Answer :

For a octagon we know that it has eight sides.

So let us substitute n = 8 in the above formula.

Sum of interior angles is given as = (2 × 8 – 4) × 90

= (16 – 4) × 90

= 12 × 90

= 1080°

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