Interior/Exterior Angles of Polygons

What is the sum of the measures of the interior angles of a pentagon?

What is the sum of the measures of the interior angles of a 27-gon?

What is the measure of EACH interior angle of a regular octagon?

What is the measure of each interior angle of a regular 20-gon?

Five angles of a hexagon measure 119 degrees, 129 degrees, 104 degrees, 139 degrees, and 95 degrees. What is the measure of the sixth angle?

The sum of the interior angles of a polygon is 1620 degrees. How many sides does the polygon have?

The sum of the interior angles of a polygon is 3960 degrees. How many sides does the polygon have?

What is the sum of the measures of the exterior angles of a nonagon?

What is the measure of each exterior angle of a regular 20-gon?

If the exterior angle of a regular polygon measures 9 degrees, how many sides does the polygon have?