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Some GeometricaL Applications of Vectors
Published online by Cambridge University Press: 03 November 2016
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The aim of the following notes is merely to indicate the straight-forward way in which vectors lend themselves to geometry. Some of the work is less direct than it might be, but this is partly due to the desire to keep to first principles as much as possible.
The chain of theorems in § 6 has been suggested by a chain constructed many years ago by Mr. H. W. Richmond. In this, points are taken on a unit circle and the second unit circle through each pair of points is drawn ; the centres give rise to a chain of unit circles.
1.1. Relation between mutual distances of 4 points in a plane.
Let O, A, B, C be the four given points.
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