The number of triangles that are necessary to construct an octagon is 6, and the sum of the interior angle measures of an octagon is 1080°.
What is an octagon?
An octagon is an eight sided polygon. If taking only non-adjacent vertices, the triangles needed to construct an octagon is six.
Non-adjacent vertices are those which are not adjacent to each other.
By the formula of finding the interior angle measures of any polygon is
(n - 2) (180°)
The triangles form an octagon are 8
(8 - 2) = 6
Thus, the number of triangles are 6, and the sum of the interior angle measures of an octagon is 1080°.
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