Plane and Solid Geometry

AABC ABCD altitude angles are equal apothem base bisector bisects called chord circular cone circumference circumscribed coincide cone of revolution congruent construct COROLLARY corresponding sides cube diagonal diameter dihedral angles distance draw equiangular equilateral triangle equivalent EXERCISE face angles figure Find the area Find the locus Find the volume frustum given circle given line given point hypotenuse intersection isosceles triangle lateral area lateral edges lateral faces lune mid-point number of sides oblique parallel lines parallelogram perimeter perpendicular plane geometry plane MN polyhedral angle polyhedron prismatoid Proof PROPOSITION prove quadrilateral radii radius ratio rectangle rectangular parallelepiped regular inscribed regular polygon regular pyramid right angle right circular right triangle segments slant height sphere spherical polygon spherical triangle square straight line symmetric with respect tangent tetrahedron THEOREM triangle ABC triangular trihedral vertex vertices