## Elements of Geometry and Trigonometry |

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ABCD adjacent altitude angled triangle base become Book called centre chord circle circumference circumscribed common cone consequently contained convex Cosine Cotang cylinder described determine diameter difference distance divided draw drawn equal equations equivalent expressed extremities faces feet figure follows formed four frustum give given gles greater half hence homologous hypothenuse included inscribed intersection less logarithm manner means measured meet middle multiplied number of sides opposite parallel parallelogram pass perpendicular plane polygon prism PROBLEM Prop proportional PROPOSITION pyramid quantities radii radius ratio reason rectangle regular remaining right angles Scholium segment sides similar sine solid solid angle sphere spherical triangle square straight line suppose surface taken tang tangent THEOREM third triangle triangle ABC unit vertex whole