regular polygon
[noun]
a two-dimensional closed shape with straight sides and equal angles between adjacent sides, and all sides have the same length
English Words for "Polygons"
Read this lesson to learn the names of polygons in English, such as "convex polygon", "heptagon" and "hendecagon".
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irregular polygon
[noun]
a polygon that does not have all sides or angles equal in size or measure, making it non-regular and lacking symmetry
convex polygon
[noun]
a geometric shape that has all its interior angles measuring less than 180 degrees, causing the polygon to curve outward
concave polygon
[noun]
a geometric shape that has at least one angle measuring greater than 180 degrees, causing the polygon to curve inward
pentagon
[noun]
a geometric shape with five angles and five straight sides
Ex:
The
stop sign
is
shaped
like
a
red
pentagon
to
alert
drivers
to
halt
.
hexagon
[noun]
(geometry) a closed shape with six straight sides and six angles
Ex:
She
decided
to
tile
her
bathroom
floor
with
hexagon-shaped
tiles.
heptagon
[noun]
a seven-sided plane shape consisting of seven line segments or edges that meet at seven interior angles
Ex:
One
version
of
the
game
featured
a
board
laid out
in
a
grid
of
non-uniform
heptagons
instead of
the
usual
squares
.
octagon
[noun]
(geometry) a polygon consisting of eight straight sides and eight angles
Ex:
Each
of
the
eight
sides
of
the
octagon
was
painted
a
different
color
.
decagon
[noun]
(geometry) a flat polygon with ten straight sides and ten angles
Ex:
Architects
sometimes
incorporate
shapes
like
the
decagon
into
their
designs
for
a
unique
appearance
.
hexagram
[noun]
(geometry) a flat star-shaped figure with six points that can be formed by making equilateral triangles on each side of a regular hexagon
trilateral
[noun]
a three-sided geometric shape
Ex:
The
graphic designer
incorporated
a
trilateral
into
the
logo
design
.