Perpendicular Lines Welcome! You are encouraged to register with the site and login (for free). When you register, you support the site and your question history is saved. In the xy-plane above, is angle QPR a right angle?(1) Line segment PQ is perpendicular to the x-axis. (2) Line segment PR is perpendicular to the y-axis. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient. EACH statement ALONE is sufficient. Statements (1) and (2) TOGETHER are NOT sufficient. Review Answer