Right angle (geometry)/Related Articles
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- See also changes related to Right angle (geometry), or pages that link to Right angle (geometry) or to this page or whose text .
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- Euclidean geometry : Form of geometry first codified by Euclid in his series of thirteen books, The Elements.
- Perpendicular (geometry) : Add brief definition or description
- Rectilinear angle (geometry) : The 'steepness' between two straight lines.