A pattern exists in the sum of the interior angles of polygons. The sum of the interior angles of a triangle is 180°, of a quadrilateral is 360°, and of a pentagon (5 sides) is 540°. What is the sum of
the interior angles of a nonagon (9- sided shape)?

1,620 degrees.

Step-by-step explanation:

It has a steady pattern. 180 x 2 = 360, which is quadrilateral. 180 x 3 = 540, which is a pentagon. so, 180 x 9 = 1,620

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step-by-step explanation:

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