Plane and Solid Geometry

ABCD altitude angles are equal angles equal annexed figure B₁ b₂ bisected bisectors C₁ called central angle chord circumcenter circumference circumscribed cone congruent construct convex COROLLARIES corresponding definition diagonals diameter dihedral angle divided drawn edges equal angles equals the sum equidistant EXERCISES figure of th frustum geometry given line given point greater Hence hypotenuse inscribed interior angles intersection isosceles triangle line joining line-segment meet mid-points oblique opposite sides parallel parallelepiped parallelogram perigon perimeter perpendicular plane plane geometry polygon polyhedral angle prism Prismatoid Proof pyramid quadrilateral radii radius ratio rectangle reflex angle regular regular polygon respectively rhombus right angle right-angled triangle Section segments Similarly sphere spherical spherical polygon square straight angle straight line student Suppose surface symmetric tangent Theorem transversal trapezoid vertex vertices zero