The Elements of Geometry |
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altitude angle formed angles equal apothem base and altitude bisector bisects chord circumference circumscribed Conc concur congruent Const construct cube cylinder diagonals diameter dihedral distance divided Draw drawn edge equals the sum equidistant equilateral triangle exterior figure Find frustum geometry given circle given line given point homologous hypotenuse inscribed interior angles intersect isoangular isosceles triangle join line-segment locus measured median mid-join mid-perpendicular n-gon number of sides parallel parallelogram pass perimeter perpendicular perpendicular to plane plane MQ polyhedral prism PROB proof Prove pyramid radii radius ratio rectangle rectangular parallelepiped regular hexagon regular polygon right angles right circular right triangle segment Show Similarly slant height sphere spherical spherical polygon square straight line SUMMARY OF PROPOSITIONS supplemental tangent theorem total surface trapezoid triangle equals trihedral vertex angle vertices volume