The Elements of Geometry

AB'C ABC and DEF ABCD approaches the limit axis base and altitude base multiplied bisect centre circle circular cone circumference circumscribed cone of revolution COROLLARY cube denote the volume diagonals diameter diedral angles dimensions distance equal and parallel equal bases equally distant equivalent face angles Find the volume frustum generatrix Hence inscribed intersection lateral area lateral edges lateral faces lateral surface lower base lune mutually equiangular O-ABC parallel planes parallelogram perimeter perpendicular to MN plane MN polar triangle prism is equal PROPOSITION radii radius rectangles rectangular parallelopiped regular polygon regular pyramid right angles right section SCHOLIUM similar polyedrons slant height sphere spherical angle spherical excess spherical polygon spherical pyramid spherical triangle squares tetraedron THEOREM tri-rectangular triangle triangles ABC triangular prism triangular pyramid triedral truncated upper base vertex vertices Whence