MPCS Geometry Honors Vocab Ch. 10

35 terms · test next thursday

polyhedron

a solid formed by polygons that enclose a single region of space

faces

the flat polygonal surfaces of a polyhedron

edge

a segment where two faces intersect

vertex of the polyhedron

the point of intersection of three or more edges

tetrahedron

a polyhedron with four faces

hexahedron

a polyhedron with six faces

heptahedron

a polyhedron with seven faces

decahedron

a polyhedron with ten faces

dodecahedron

a polyhedron with twelve faces

regular polyhedron

each face of the polyhedron is enclosed by a regular polygon, and each face is congruent to the other faces, and the faces meet at each vertex in the exact same way

prism

has two faces called bases, that are congruent, parallel polygons

lateral faces

the sides of a prism that aren't bases

right prism

a prism whose lateral faces are rectangles

oblique prism

a prism that is not a right prism

altitude of a prism

any perpendicular segment from one base to the plane of the other base

height of a prism

the length of the altitude

pyramid

a polyhedron with one base, the other sides are lateral faces and meet to form lateral edges

vertex of the pyramid

the common intersection point of the lateral faces

altitude of a pyramid

the perpendicular segment from its vertex to the plane of the base

sphere

the set of all points in space at a given distance from a given point

the given distance

the given point

hemisphere

half of a sphere and its circular base (which is a great circle of the sphere)

cylinder

has two circular bases that are both parallel and congruent

axis of the cylinder

the segment connecting the centers of the bases

altitude of the cylinder

any perpendicular segment from the plane of one base to the plane of the other, the length is called the height

right cylinder

if the axis of the cylinder is perpendicular to the base

oblique cylinder

a cylinder that is not a right cylinder

cone

has a circular base and a vertex

vertex of the cone

the point that is the greatest perpendicular distance from the base

altitude of the cone

the perpendicular segment from the vertex to the plane of the base, the length of which is called the height

right cone

a cone with the line segment connecting the vertex of the cone to the center of the base that is perpendicular to the base

oblique cone

a cone that is not a right cone