Unit 11 Math
Word/Vocabulary
apex
base
Example/Picture
Explain
In a pyramid or
cone, the vertex
opposite the base.
The face of a
pyramid or cone
that is opposite its
apex. The base of
a cone is a circle.
Calibrate
To divide or mark
a measuring tool
with gradations
such as the
degree marks on a
thermometer.
OR
To test and adjust
the accuracy of a
measuring tool.
cone
A 3 dimensional
figure that has a
circular base, a
curved surface,
and one vertex
(apex). The points
on the curved
surface of a cone
are on straight
lines connecting
the apex and the
boundary of the
base.
Unit 11 Math
cylinder
A 3 dimensional
shape that has
two circular bases
that are parallel
and congruent
and are
connected by a
curved surface.
displacement
To move
something out of
its proper place.
edge
A line segment or
curve where two
surfaces of a
geometric solid
meet.
face
A flat surface on a
3-dimentional
figure. Faces can
be flat or curved.
Geometric
solid
The surface or
surfaces that
make up a 3dimentional
figure. (Prisms,
pyramids,
cylinders, cones or
spheres)
Unit 11 Math
Polyhedron
Plural –
polyhedrons
or polyhedra
A 3-dimentional
figure formed by
polygons with
their faces
(interiors) and
having no holes.
prism
A polyhedron with
two parallel faces
(bases) that are
the same size and
shape. All of the
other faces
connect the bases
and are shaped
like
parallelograms.
pyramid
A polyhedron in
which one face
(base) may have
any polygon
shape. All of the
other faces have
triangle shapes
and come
together at the
apex.
Unit 11 Math
Regular
polyhedron
There are
only 5
A polyhedron
whose faces are
congruent and
formed by regular
polygons, and
whose vertices all
look the same.
sphere
The set of all
points in space
that are the same
distance from a
fixed point. The
fixed point is the
center of the
sphere and the
distance is the
radius.
surface
The boundary of a
3-dimentional
object. The part of
an object that is
next to the air.
Surface area
The total area of
all the surfaces
that surround a 3dimensional
object.
Vertex
(vertices;
vertexes)
The point where
the sides of an
angle, the sides of
a polygon, or the
edges of a
polyhedron meet.
Unit 11 Math