Triangle centres and homogeneous coordinates, Part I - trilinear Coordinates

Ramachandran, A. (2016) Triangle centres and homogeneous coordinates, Part I - trilinear Coordinates. At Right Angles, 5 (1). pp. 40-43. ISSN 2582-1873

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During a course in Euclidean geometry at high school level, a student encounters four classical triangle centres—the circumcentre, the incentre, the orthocentre and the centroid (introduced as the points of concurrence of the perpendicular bisectors of the sides, the bisectors of the angles of the triangle, the altitudes and the medians, respectively). We shall study two alternative ways of describing and characterising these four significant points. They are both known as homogeneous coordinate systems, but we explain the significance of this term later. In part I of the article, we consider the first of these: trilinear coordinates.

Item Type: Articles in APF Magazines
Authors: Ramachandran, A.
Document Language:
Uncontrolled Keywords: Triangle centre, incentre, centroid, orthocentre, circumcentre, trilinear coordinates, homogeneous coordinates, trigonometric ratio
Subjects: Natural Sciences > Mathematics
Divisions: Azim Premji University > University Publications > At Right Angles
Full Text Status: Public
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