## 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 Short Essays on the Ancient Geometrical Analysis, and the Theory of Transversals ... |

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A B D altitude angle A B C axiom B A C bisect Book centre circumference circumscribed cone conical surface const constructed cylinder demonstration diagonal diameter difference draw equal angles equiangular equilateral triangle equimultiples Euclid external angle extremities geometry given circle given line given point given right line greater Hence homologous sides hypotenuse inscribed intersect isosceles triangle less magnitude manner multiple opposite parallel parallelogram parallelopiped pentagon perpendicular plane polygon prism problem produced proposition proved pyramid radii radius ratio rectangle rectilinear figure respectively equal right angles right line A B segments sides A B similar solid angle square of A C surface tangent THEoREM third tiples triangle A B C vertex