In a 19 -sided polygon, what is the sum of a) the interior angles? b) the exterior angles?

Step 1 ：Let n be the number of sides in the polygon. In this case, n = 19.

Step 2 ：To find the sum of the interior angles of a polygon, we can use the formula \((n-2) \times 180\).

Step 3 ：Substitute n with 19: \((19-2) \times 180\).

Step 4 ：Simplify the expression: \(17 \times 180\).

Step 5 ：Calculate the sum: \(3060\).

Step 6 ：\(\boxed{\text{a) The sum of the interior angles of a 19-sided polygon is 3060 degrees.}}\)

Step 7 ：The sum of the exterior angles of any polygon is always 360 degrees.

Step 8 ：\(\boxed{\text{b) The sum of the exterior angles of a 19-sided polygon is 360 degrees.}}\)