3 What is the sum of the measures of the exterior angles of a dodecagon? 4 What is the measure of each exterior angle of a regular 20-gan? 5 If the sum of the interior angles of a polygon is 1980. how many sides does it have? 6 IP an interior angle of a regular polygon measures 44. how many sides does it have? 7P an exterior angle of a regular polygon measures 15. how many sides does it have? 8 If the measures of a heptagon are 127, 152, 12, 123, 135. and 105, what is the measure of the remaining angle? L Solve for x 129 (5+17) (7x-46) 94 (9x-11) 10 Find mzC (8x-3) If the figure is a regular polygon. Find the value of x 12 F the Figure is a regular polygon, And the value of x D B108 (14x-25) 133 E (10x-5)" 52 A F (7x+3) (6x-21)