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Review: Euclid's Elements
User Review  Tim Nichols  GoodreadsStudying Euclid is one of the classical gateways to learning to think logically and clearly, learning to articulate all the steps in an argument. There are, of course, many more means of persuasion ... Read full review
Review: Euclid's Elements
User Review  Zelda  GoodreadsJust finished Book I. I worked through the 48 proofs by taking about 4  7 per morning. Yesterday morning I worked through 5 proofs and had just about enough time for two more which would have allowed ... Read full review
Common terms and phrases
ABCD adjacent angles angle ABC angle ACB angle BAC angle DEF angle EDF angles equal Axiom base BC BC is equal bisected centre circle ABC circumference Constr Construction Definition 15 demonstration double draw equal angles equal to F equiangular equilateral and equiangular equimultiples Euclid Euclid's Elements exterior angle fourth given circle given straight line gnomon greater ratio Hypothesis less Let ABC Let the straight meet multiple opposite angle parallel to BC parallelogram perpendicular point F polygon produced proportionals PROPOSITION 13 q.e.d. PROPOSITION rectangle contained remaining angle right angles segment shown sides similar and similarly Simson square described square on AC straight line &c THEOREM three straight lines touches the circle triangle ABC triangle DEF twice the rectangle Wherefore