What is a Parallelogram?
A quadrilateral with two sets of parallel sides
A parallelogram is a four-sided shape (a quadrilateral) where both pairs of opposite sides are parallel, which means they run side by side and never cross. These opposite sides are also equal in length, and opposite angles are equal too.
So, is a rectangle a parallelogram?
-
It is a quadrilateral
-
Both pairs of sides are parallel and equal in length
-
Opposite angles are equal
Yes! A rectangle is a parallelogram, and so are:
-
Rhombus – A parallelogram with four equal sides
-
Square – A special parallelogram with equal sides and right angles
We use parallelograms in geometry to understand area, symmetry, and angle relationships.
When Do Students Learn About Parallelograms?
Students encounter parallelograms while learning about different types of quadrilaterals and how to classify geometric figures.
Grades 3–5 – Introduction to Parallelograms
Students learn to identify and classify parallelograms as part of their study of quadrilaterals and polygons.
Grades 6+ – Working with Parallelograms in Geometry
Students explore properties, formulas for area, and angle relationships within parallelograms.
