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Geometry Vocabulary
Word/Definition
square- a rectangle with all 4 sides
of equal length
rectangle- a closed plane shape
with 4 sides and 4 square corners
plane shapes- geometric shapes
that have no thickness. They lie in
one plane and are a two
dimensional object
triangle- a closed plane shape with
3 sides and 3 angles
hexagon- a closed plane shape
with 6 sides and 6 angles
Examples
Geometry Vocabulary
Word/Definition
trapezoid- a 4-sided plane shape
with 2 sides parallel and 2 sides
not parallel
pentagon- a 5-sided plane shape
Oval- a closed curve in a plane
which "loosely" resembles the
outline of an egg
parallel- straight lines lying in the
same plane but never meeting no
matter how far extended
parallelogram- a 4-sided plan
shape; the opposite sides of a
parallelogram are parallel and
equal in length
Examples
Geometry Vocabulary
Word/Definition
Examples
side- the straight part of a shape
on a plane figure
(The arrows are showing 2 of the 4 sides
on this square)
angle- the place where two or
more edges meet
(The letters a, b, and c are all showing the
angles of this triangle)
two dimensional- a shape that only
has two dimensions (such as width
and height) and area but does not
have volume
plane- a flat, two dimensional
surface
quadrilateral- a 4-sided plane
shape
Geometry Vocabulary
Word/Definition
vertex/vertices- the place where 2
or more sides meet on a plane
figure
Examples