Treatise on Plane and Solid Geometry

adjacent angles altitude angles are equal angles equal angles formed apothem arc BD bisect called chord circle circumference circumscribed coincide cone Corollary Corollary.-If Corollary.-Two curve demonstration diagonals diameter direction distance divided edges equal angles equally distant equivalent extent exterior angles faces figure four right angles frustum geometry given angle given line given point given straight line given triangle gles greater Hence homologous lines hypotenuse hypothesis inscribed inscribed angle intersection isosceles triangle less let fall measured by half number of sides opposite sides parallel lines parallelogram parallelopiped perimeter perpen perpendicular plane polyedral polyedron prism PROBLEMS IN DRAWING proportion proposition pyramid quadrilateral radii radius ratio rectangle regular polygon respectively equal rhombus right angled triangle secant similar triangles similarly arranged sphere spherical square described surface tangent tetraedrons theorem Theorem.-The Theorem.—If triangle ABC triangles are equal triedral vertex vertices