The First Six Books of the Elements of Euclid: And Propositions I-XXI of Book XI, and an Appendix on the Cylinder, Sphere, Cone, Etc., with Copious Annotations and Numerous Exercises |
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Common terms and phrases
ABCD AC is equal ADē adjacent angles angle ABC angle ACB angle BAC angular points Axiom base BC bisector centre chord circles touch circumference circumscribed circle collinear common concurrent lines const cyclic quadrilateral Dem.-Let Dem.-Since diagonals diameter divided draw equal angles equal to AC equiangular equilateral triangle escribed circles Euclid Exercises exterior angle given circle given line given point greater Hence the angle hypotenuse inscribed isosceles triangle less line joining locus manner meet middle points multiple nine-points circle opposite sides parallel parallelogram perpendicular plane points of intersection produced PROP proportional Proposition prove radii radius rectangle contained rectilineal figure regular polygon respectively equal right angles right line segments semicircle sides AC similar square on AC tangent theorem triangle ABC vertex vertical angle