Chapter 9

Question 1

Circumference

Answer 1

The distance around a circle

Question 2

Pi

Answer 2

The ratio of the
circumference of a circle to the
length of its diameter; . 3.14 or 22 over 7

Question 3

Composite figure

Answer 3

A figure made up of geometric shapes

Question 4

Face

Answer 4

A flat surface of a polyhedron

Question 5

Edge

Answer 5

The line segment along
which two faces of a polyhedron
intersect.

Question 6

Polyhedron

Answer 6

A three-dimensional
figure in which all the surfaces or
faces are polygons.

Question 7

Vertex

Answer 7

On an angle or polygon,
the point where two sides
intersect.

Question 8

Base

Answer 8

) A side of a

polygon.

Question 9

Prism

Answer 9

A polyhedron that has two
congruent polygon-shaped bases
and other faces that are all
parallelograms.

Question 10

Pyramid

Answer 10

A polyhedron with a
polygon base and triangular sides
that all meet at a common vertex.

Question 11

Cylinder

Answer 11

A three-dimensional 
figure with two parallel, 
congruent circular bases 
connected by a curved lateral 
surface.

Question 12

Cone

Answer 12

A three-dimensional figure
with one vertex and one circular
base.

Question 13

Sphere

Answer 13

A three-dimensional
figure with all points the same
distance from the center

Question 14

Volume

Answer 14

The number of cubic

units needed to fill a given space

Question 15

Net

Answer 15

An arrangement of two-
dimensional figures that can be
folded to form a polyhedron

Question 16

Surface area

Answer 16

The sum of the
areas of the faces, or surfaces, of a
three-dimensional figure

Question 17

Lateral face

Answer 17

A face of a prism or

a pyramid that is not a base

Question 18

Lateral area

Answer 18

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

Question 19

Perimeter

Answer 19

The distance around a polygon