The Elements of Geometry

ABCD adjacent altitude approach the limit base bisector bisects Book called centre chord circle circumference circumscribed coincide common cone construct cylinder denote describe diagonals diameter diedral divided draw drawn edges equal respectively equally distant equilateral equivalent EXERCISES extremities faces fall figure Find formed four frustum given given point greater Hence homologous hypotenuse included inscribed intersection isosceles triangle joining lateral area length less line drawn manner measured meet middle point multiplied parallel parallelogram parallelopiped passing perimeter perpendicular plane polygon prism PROBLEM produced Prop proportional PROPOSITION prove pyramid quadrilateral radii radius ratio rectangle regular respectively right angles right triangle segment sides similar sphere spherical triangle square straight line surface tangent tetraedron THEOREM third triangle ABC unit vertex vertices volume Whence