If the number of sides of a polygon is 5. Find
the sum of all interior angles of a polygon.
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How many triangles do you think a 5-sided polygon will have? Here's a pentagon, a 5-sided polygon. From vertex A we can draw two diagonals which separates the pentagon into three triangles. We multiply 3 times 180 degrees to find the sum of all the interior angles of a pentagon, which is 540 degrees.
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Answer:
the sum of all interior angles of a pentagon =450 degrees
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