Maths Olympiad Prep

Library / CEMC Pascal /249 of 603

CEMC Pascal, 2026

Geometry Difficulty 1.4 Junior Find the answer Canada

In the diagram, the point P(2,3)P(2, 3) is reflected in the xx-axis and then moved 33 units left. What are the coordinates of
the resulting point?

Figure 0

Pick one

Solution

When a point (x,y)(x,y) is
reflected in the xx-axis, the
resulting point has coordinates (x,−y)(x,-y). Thus when P(2,3)P(2,3) is reflected in the xx-axis, the resulting point has
coordinates (2,−3)(2,-3). When a point
(x,y)(x,y) is moved 33 units left, the resulting point has
coordinates (x−3,y)(x-3,y). Thus when
(2,−3)(2,-3) is moved 3 units left, the
resulting point has coordinates (−1,−3)(-1,-3).

Want a route through all this instead of an archive? The track puts 2,604 problems in a working order, from Junior Challenge level to the IMO shortlist.

Source: CEMC, University of Waterloo, licensed CC-BY-NC-4.0. Statement reproduced verbatim; metadata (topic, difficulty) added by this project.