The First Six Books of the Elements of Euclid, with a Commentary and Geometrical Exercises: To which are Annexed a Treatise on Solid Geometry, and a Short Essay on the Ancient Geometrical Analysis
John Taylor, 30 Upper Gower Street, Bookseller and Publisher to the University: and sold, 1828 - 324 σελίδες
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A B C altitude appears arcs assumed axiom base bisect Book called centre circle circumference coincide common compounded const constructed contained definition demonstration described diameter difference divided double draw drawn equal equal angles equiangular equilateral equimultiples evident expressed external extremities fall figure follows four fourth given line given point given right line greater half Hence included inscribed internal intersect joining less line A B magnitudes manner mean meet multiple opposite parallel parallelogram pass perpendicular placed plane position problem produced proportional PROPOSITION proved radii radius ratio rectangle remaining right angles right line segment sides sides A B similar solid solution square surface taken tangent THEOREM third triangle twice vertex vertices whole
Σελίδα 19 - If two triangles have two sides of the one respectively equal to two sides of the other, and the contained angles supplemental, the two triangles are equal.
Σελίδα 24 - DE : but equal triangles on the same base and on the same side of it, are between the same parallels ; (i.
Σελίδα 104 - ... be equimultiples, the one of the second, and the other of the fourth. Let A the first be the same multiple of B the second, that C the third is of D the fourth ; and of A, C let equimultiples EF, GH be taken.
Σελίδα 107 - ... If there be three magnitudes, and other three, which have the same ratio taken two and two, but in a cross order; then if the first magnitude be greater than the third, the fourth shall be greater than the sixth: and if equal, equal; and if less, less.
Σελίδα 107 - N ; and if equal, equal ; and if less, less : but if G be greater than L, it has been shown that L HC K E M F N H is greater than M ; and if equal, equal; and if less, less: therefore, if G be greater than L, K is greater than N ; and if equal, equal ; and if less less : and G, K are any equimultiples whatever of A, E ; and L, N any whatever of B, F : therefore as A is to B, so is E to F (5.
Σελίδα 174 - If two angles of one triangle are equal to two angles of another triangle, the third angles are equal, and the triangles are mutually equiangular.
Σελίδα 107 - IF the first be to the second as the third to the fourth, and if the first be a multiple, or part of the second; the third is the same multiple, or the same part of the fourth...
Σελίδα 107 - THEOR. IF the first be the same multiple of the second, or the same part of it, that the third is of the fourth ; the first is to the second, as the third is to the fourth...