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We know that the sum of the interior angles of a triangle is 180∘. Show that the sums of the interior angles of polygons with 3, 4, 5, 6, …. sides form an arithmetic progression. Find the sum of the interior angles for a 21 sided polygon. |
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Answer» We know that the sum of the interior angles of a triangle is 180∘. Show that the sums of the interior angles of polygons with 3, 4, 5, 6, …. sides form an arithmetic progression. Find the sum of the interior angles for a 21 sided polygon. |
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