Chapter 9 Flashcards
Circumference of a circle
C=3.14xdiameter or C=3.14x2xradius
Area of a circle
A=3.14xRsquared
The ratio of the
circumference of a circle to the
length of its diameter;
Pi
The distance around a
polygon.
Perimeter
The distance
around a circle.
Circumference
A figure made up of simple geometric shapes.
Composite figure
A flat surface of a
polyhedron.
Face
The line segment along
which two faces of a polyhedron
intersect.
Edge
A three-dimensional
figure in which all the surfaces or
faces are polygons.
Polyhedron
On an angle or polygon,
the point where two sides
intersect.
Vertex
A face of a three-
dimensional figure by which the
figure is measured or classified.
Base
A three-dimensional figure
with one vertex and one circular
base.
Cone
A three-dimensional figure with two parallel, congruent circular bases connected by a curved lateral surface.
Cylinder
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.
Lateral area
A face of a prism or
a pyramid that is not a base.
Lateral face
An arrangement of two-
dimensional figures that can be
folded to form a polyhedron
Net
A polyhedron that has two
congruent polygon-shaped bases
and other faces that are all
parallelograms.
Prism
A polyhedron with a
polygon base and triangular sides
that all meet at a common vertex.
Pyramid
A three-dimensional
figure with all points the same
distance from the center.
Sphere
The sum of the
areas of the faces, or surfaces, of a
three-dimensional figure.
Surface area
Number of cubes a three dimensional figure can hold.
Volume
Perimeter of a square
P=2L+2W
