The figure can be assessed to find the statements as follows
15. ∠ 4 and ∠ 7 are supplementary, True
16. ∠ 3 and ∠ 10 are complementary, True
17. ∠ 4 and ∠ 5 form a linear, False
18. ∠ 2 and ∠ 10 are vertical angles, False
19. ∠ 1 and ∠ 2 form a linear, True
20. ∠ 7 and ∠ 9 are vertical angles, True
Analysis of the figure and the statement
The figures and the statement are analyzed as follows
15. ∠ 4 and ∠ 7 are supplementary, True
They are angles on a straight line
16. ∠ 3 and ∠ 10 are complementary, True
They are complementary angles because it is on a straight line with ∠ 12 which is 90 degrees.
17. ∠ 4 and ∠ 5 form a linear, False
The statement cannot be assumed from the figure
18. ∠ 2 and ∠ 10 are vertical angles, False
In the figure, ∠ 2 and ∠ 10 are not vertical angles
19. ∠ 1 and ∠ 2 form a linear, True
In the figure, ∠ 1 and ∠ 2 are linear pair
20. ∠ 7 and ∠ 9 are vertical angles, True
In the figure, ∠ 7 and ∠ 9 are vertical angles