Elements of Plane and Solid Geometry

AABC AB² ABC and DEF altitude angle formed angles are equal apothem bisector bisects chord circumf circumference cone COROLLARY cylinder decagon DEFINITION diagonals diameter dihedral angles divided drawn EFGH equal angles equally distant equiangular polygon equilateral triangle equivalent EXERCISE exterior angles Find frustum given circle given line given point hexagon homologous hypotenuse inscribed angle isosceles triangle lateral area lateral edges Let ABC line joining middle points number of sides oblique opposite sides parallelogram parallelopiped Pass a plane perimeter perpendicular plane MN point of intersection polyhedral angle polyhedron prism prolonged PROPOSITION Prove ABCD Prove Proof pyramid quadrilateral radii radius rectangle rectangular parallelopiped regular inscribed regular polygon rhombus right angles SCHOLIUM secants segments Show slant height sphere spherical square straight line surface tangent tetrahedron THEOREM trapezoid triangle ABC trihedral unequal unit of measure vertex volume Whence