Elements of Geometry

ABC and A'B'C ABCD adjacent angles altitude angles are equal apothem base and altitude bisecting bisector centre chord circumference circumscribed coincide construct Def.-The Defs.-A diagonals diameter diedral angles distance divided draw equivalent Exercise.-The face angles figure frustum given circle given line given point given straight line GIVEN TO PROVE Hence homologous hypotenuse included angle intersection isosceles triangle lateral area lateral faces locus middle point number of sides parallel lines parallel to BC parallelogram parallelopiped perimeter perpendicular plane MN polyedral angles polyedron prismatic surface PROPOSITION VII pyramid quadrilateral radii radius ratio of similitude rectangle regular inscribed regular polygon respectively equal rhombus right angles right section right triangle segment similar slant height sphere spherical polygon spherical triangle square surface symmetrical tangent THEOREM triangle ABC triangles are equal triangular prism triedral unequal vertex vertices volume