Final answer:
Three points to the left, right, above, and below (17, 12) in a coordinate system.
Step-by-step explanation:
a) Three points to the left of (17, 12) could be (16, 12), (15, 12), and (14, 12).
b) Three points to the right of (17, 12) could be (18, 12), (19, 12), and (20, 12).
c) Three points above (17, 12) could be (17, 13), (17, 14), and (17, 15).
d) Three points below (17, 12) could be (17, 11), (17, 10), and (17, 9).