Download Geometric Terms and Definitions

Geometric Terms and Definitions
Mathematical Term
Equilateral Triangle
Isosceles Triangle
Scalene Triangle
Diagonal
Polygon
Quadrilateral
Pentagon
Hexagon
Octagon
Square
Rectangle
Parallelogram
Rhombus
Trapezoid
Definition
A triangle with three equal sides and three equal angles.
A triangle with exactly two equal sides and exactly two
equal angles.
A triangle without any equal sides or equal angles.
A line segment joining two non-adjacent vertices of a
polygon
A plane shape with three or more straight sides.
A polygon with four sides.
A polygon with five sides.
A polygon with six sides.
A polygon with eight sides.
A quadrilateral with four equal sides and four right angles.
The opposite sides are parallel.
A quadrilateral with four right angles and opposite sides
that are parallel. The opposite sides are also equal.
A quadrilateral with opposite sides that are parallel. The
opposite sides are also equal.
A quadrilateral with four equal sides and opposite sides
that are parallel.
A quadrilateral with only one pair of parallel sides.
Circle
A plane shape bounded by a continuous curve which is
always the same distance from the centre.
Prism
A three-dimensional figure with two identical and parallel
bases.
A three-dimensional figure with identical and parallel
triangular bases and three other rectangular faces.
A three-dimensional figure with identical and parallel
rectangular bases and four other rectangular faces.
Opposite faces are identical.
A three-dimensional figure made up of 6 identical square
faces.
Triangular prism
Rectangular prism
Cube
Cylinder
Cone
Pyramid
Sphere
Scale model
Orthographic drawing
Isometric drawing
Pattern
Plan
Net
Imperial system
Metric system
A three-dimensional figure with identical and parallel
circular bases and one curved surface.
A three-dimensional figure with a circular base and a
curved surface sitting on the base that tapers to a point.
A three-dimensional figure with a polygon base and
triangular faces that taper to a point.
A three-dimensional figure that is a perfectly round (i.e. a
ball).
A representation of a real object where all of the
measurements maintain their original proportion.
A representation of an object showing three views: top,
front, and side.
A drawing used to represent a three-dimensional object in
two dimensions. The sides are drawn at 30 degree angles
to the horizontal.
A template from which parts of an object are traced, cut
out and then assembled.
An overhead view of a room or building.
A representation of a three-dimensional object that
displays all of the faces of the figure drawn as twodimensional figures. All faces are connected and can be
folded to form the three dimensional figure.
A system of measurement involving inches, feet, miles,
pounds, gallons and ounces.
A system of measurement involving kilometres, metres,
centimetres, grams, kilograms, litres and millilitres.