Chapter 9 Flashcards
(19 cards)
Circumference
The distance around a circle
Pi
The ratio of the
circumference of a circle to the
length of its diameter; . 3.14 or 22 over 7
Composite figure
A figure made up of geometric shapes
Face
A flat surface of a polyhedron
Edge
The line segment along
which two faces of a polyhedron
intersect.
Polyhedron
A three-dimensional
figure in which all the surfaces or
faces are polygons.
Vertex
On an angle or polygon,
the point where two sides
intersect.
Base
) A side of a
polygon.
Prism
A polyhedron that has two
congruent polygon-shaped bases
and other faces that are all
parallelograms.
Pyramid
A polyhedron with a
polygon base and triangular sides
that all meet at a common vertex.
Cylinder
A three-dimensional figure with two parallel, congruent circular bases connected by a curved lateral surface.
Cone
A three-dimensional figure
with one vertex and one circular
base.
Sphere
A three-dimensional
figure with all points the same
distance from the center
Volume
The number of cubic
units needed to fill a given space
Net
An arrangement of two-
dimensional figures that can be
folded to form a polyhedron
Surface area
The sum of the
areas of the faces, or surfaces, of a
three-dimensional figure
Lateral face
A face of a prism or
a pyramid that is not a base
Lateral area
The sum of the areas of the lateral faces of a prism or pyramid, or the area of the lateral surface of a cylinder or cone
Perimeter
The distance around a polygon
