The 90 degree angle between two perpendicular lines.
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"Right angle" Quotes from Famous Books — The Shades of the Wilderness • Joseph A. Altsheler — Dick Sand - A Captain at Fifteen • Jules Verne — Manual of Surgery Volume Second: Extremities--Head--Neck. Sixth Edition. • Alexander Miles — The Collected Works of Ambrose Bierce, Vol. II: In the Midst of Life: Tales of Soldiers and Civilians • Ambrose Bierce — Susan Lenox: Her Fall and Rise • David Graham Phillips |
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