an exact location
E
in space
A
B
part of a line
between and
including two points
a point at the end
of a line segment
a straight path that
extends forever in
opposite directions
a part of a line
starting at an endpoint
A
and continuing forever
in one direction.
a figure formed by two
rays or two line
segments with a common
endpoint called a vertex
the point at which the
rays of an angle, the sides
of a polygon, or the edges
of a polyhedron meet.
a 90
°
angle
a 3-sided
polygon
a 4-sided polygon
a rectangle with all sides
of equal length; all angles
in a square are right angles
a parallelogram
with all sides the
same length
a parallelogram
with all right
angles
a quadrilateral with two
pairs of parallel sides;
opposite sides have the
same length
a quadrilateral that
has exactly one pair
of parallel sides
a quadrilateral with
two pairs of adjacent
sides of equal length
lines on a plane that
are always the same
distance apart; the lines
will never meet
to share a
common point
two lines or planes
that intersect at right
angles
one of the line segments
that make up a polygon;
one of the rays or
segments that forms an
angle; a face of a
polyhedron
A 2-dimensional figure
formed by three or
more line segments
a 5-sided
polygon
a polygon on which no two
points can be connected with a
line segment that passes
outside the polygon; all
vertices are “pushed” outward.
a polygon on which there are at
least two points that can be
connected with a line segment
that passes outside the polygon;
it appears to be “pushed in”
a 6-sided
polygon
a 7-sided
polygon
a 7-sided
figure
a 9-sided
figure
a 2-dimensional figure
formed by three or
more line segments; n
is the number of sides
The set of all points in
a plane bounded by a
closed 2-dimensional
figure, such as a
polygon or circle
a polygon in which all
sides are the same
length and all angles
have the same measure
a triangle with
all three sides
equal in length
compass
a tool used to
draw circles and
arcs and copy
line segments
the set of all points in
a plane that are
equally distant from a
fixed point in the
plane called the
center of a circle
radius
the distance
from the center
to the circle
2 figures that are
the same size and
same shape
circles that have the
same centers but radii
of different lengths
a polygon whose
vertices are all on
the same circle