Download Introducing Shapes

Geometry
The shape of
things to come…
Quadrilaterals
There are many
different kinds of
quadrilaterals. All of
them have certain things
in common. But most
importantly they
all have
four sides!
Trapezoid:
A quadrilateral that has at least
one pair of parallel sides.
Parallelogram:
Opposite sides are
parallel and of equal length.
The opposite angles are equal.
This shape is
also a trapezoid.
Rhombus:
This parallelogram has four
equal sides, but does not
have four right angles.
(It is also a
parallelogram AND
a trapezoid!)
Rectangle:
Has two parallel pairs of lines
and four right angles.
(It is also a
parallelogram AND
a trapezoid.)
Square:
Has two parallel pairs of lines,
four right angles, and all four
sides are equal in length.
(It is also a
parallelogram,
a trapezoid,
AND a
rectangle!)
Triangles
Equilateral Triangle:
All three sides are equal.
Each angle is equal to 60°.
Also called an
acute-angled
triangle.
Right Triangle:
It has a right angle (90°) in
one of its corners.
Isosceles Triangle:
Only two sides have the same
length. Two angles are equal.
Scalene Triangle:
Each side is a different length.
None of the angles are equal.