Are you curious to know what is not a parallelogram? You have come to the right place as I am going to tell you everything about not a parallelogram in a very simple explanation. Without further discussion let’s begin to know what is not a parallelogram?

**What Is Not A Parallelogram?**

A parallelogram is a quadrilateral with two pairs of parallel sides. However, not all quadrilaterals are parallelograms. In this blog, we’ll explore what makes a quadrilateral not a parallelogram, and discuss some common examples.

A quadrilateral is a polygon with four sides. There are many different types of quadrilaterals, but a parallelogram is a specific type that has certain properties. Specifically, a parallelogram has two pairs of parallel sides and opposite angles that are congruent (i.e., equal in measure). These properties make a parallelogram unique and distinguish it from other quadrilaterals.

So, what makes a quadrilateral, not a parallelogram? There are several possibilities:

**Unequal opposite sides**: One of the defining characteristics of a parallelogram is that it has two pairs of parallel sides. If the opposite sides of a quadrilateral are not parallel, then it cannot be a parallelogram. For example, a trapezoid is a quadrilateral with only one pair of parallel sides, so it is not a parallelogram.**Non-congruent opposite angles**: In addition to having two pairs of parallel sides, a parallelogram also has opposite angles that are congruent. If the opposite angles of a quadrilateral are not congruent, then it cannot be a parallelogram. For example, a kite is a quadrilateral with two pairs of adjacent sides that are congruent, but its opposite angles are not congruent, so it is not a parallelogram.**Diagonal lengths are not equal**: Another property of parallelograms is that their diagonals bisect each other. This means that the point where the diagonals intersect (called the “centroid”) is the midpoint of each diagonal. If a quadrilateral has diagonals that do not bisect each other or are not equal in length, then it cannot be a parallelogram. For example, a rectangle has diagonals that are equal in length and bisect each other, so it is a parallelogram.**Sides are not parallel or congruent**: Finally, a quadrilateral cannot be a parallelogram if it does not have any of the defining characteristics of a parallelogram. For example, a random quadrilateral with no parallel sides or congruent angles is not a parallelogram.

In conclusion, a parallelogram is a special type of quadrilateral with two pairs of parallel sides and opposite angles that are congruent. Not all quadrilaterals are parallelograms, and there are several ways in which a quadrilateral can fail to be a parallelogram. Understanding the properties of different types of quadrilaterals is important in geometry and other mathematical fields.

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**FAQ**

**Which Shape Is Not A Parallelogram?**

trapezium

A trapezium is a quadrilateral with only one pair of opposite sides equal. Hence, the trapezium is not a parallelogram.

**Which Of The Following Is Not Special Parallelograms?**

Trapezium

Hence, the answer is Trapezium.

**What Are The 4 Types Of Parallelograms?**

There are 4 types of parallelograms, including 3 special types. The four types are parallelograms, squares, rectangles, and rhombuses.

**Is A Rhombus A Parallelogram?**

Also, every rhombus is considered a parallelogram but the converse is always not true. Parallelogram: A parallelogram is a flat-shaped figure. It has four sides. The pair of opposite faces/sides of a parallelogram are parallel and congruent to each other.

**Is A Trapezoid Is A Parallelogram?**

A trapezoid has one pair of parallel sides and a parallelogram has two pairs of parallel sides. So a parallelogram is also a trapezoid.

**I Have Covered All The Following Queries And Topics In The Above Article**

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