Principles of modern geometry, with numerious applications to plane and spherical figures; and an appendix, containing questions for exercise. Intended chiefly for the use of junior students (1862)
Mulcahy, John, 1810?-1853 · Dublin Hodges, Smith · leaf 86
ADDITIONAL EXAMPLES ON ANHAEMONIC RATIO. 75 … to the given quantity. (The algebraical explanation of thiscircumstance is, that the triangle CDV changes its sign whenits vertex passes from one side of the base to the other.) We shall now apply this Lemma to prove the second Propo-sition of the last Article. Let ABCD be one of the component…
Geometry -- Problems, exercises, etc · Geometry
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