Answer: The answer is: angles 4 and 9 are alternate interior angles.
Step-by-step explanation: Answer one is incorrect. Vertical angles are formed on the opposite sides of two intersecting lines. 2 and 5 would be vertical angles.
two is also incorrect. complementary angles form a 90* angle, and 10 and 11 are supplementary (they form a 180* angle).
answer four is also incorrect. corresponding angles in this example are 9 and 1. (they are formed by two parallels lines with one intersecting line, and are in the same position)