A 82 B. 92 C. 102 11. A heptagon has three pairs of congruent angles. The first pair measures 120 each, the second pair measures 140 each, and the third pair measures 115 each. What is the measure of the 7th angle? A 50 B. 100 C. 150 D. 200 12. The interior and exterior angles of any polygon are A Congruent B. unequal C. complementary D. supplementary 13. How many degrees are there in each exterior angle of a regular nonagon? A 30 B. 40 C. 50 D. 60 14. If the measure of the interior angle of a polygon is 80°, what is the measure of its exterior angle? A 68 B. 100 C. 115 D. 123 PLEASE