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Diamond vs. Trapezoid: What's the Difference?

Edited by Aimie Carlson || By Harlon Moss || Published on February 24, 2024
A diamond is a quadrilateral with all sides equal and angles not necessarily right angles, while a trapezoid is a quadrilateral with only one pair of parallel sides.

Key Differences

A diamond, often confused with a rhombus, is a quadrilateral where all sides are of equal length but the angles can vary. In contrast, a trapezoid is defined by having only one pair of parallel sides, with the other two sides not being parallel.
The diamond shape is symmetrical, and its diagonals bisect each other at right angles, a feature not necessarily present in trapezoids. Trapezoids can have asymmetrical shapes, with their non-parallel sides being of different lengths.
In diamonds, opposite angles are equal, a property not shared by trapezoids, where only the angles on the parallel sides can be equal. The trapezoid is unique in that its parallel sides can be of different lengths.
The area of a diamond can be calculated using the product of its diagonals divided by two, whereas the area of a trapezoid is computed by averaging the lengths of the parallel sides and then multiplying by the height.
A diamond is a special type of parallelogram where all sides are equal, while a trapezoid does not necessarily fit into this category, as it only requires one pair of sides to be parallel.

Comparison Chart


All sides equal in length
Only one pair of sides parallel


Symmetrical shape
Can be asymmetrical

Angle Properties

Opposite angles are equal
No such specific angle properties

Area Calculation

Product of diagonals divided by two
Average of parallel sides times height


Type of parallelogram
Unique quadrilateral

Diamond and Trapezoid Definitions


A quadrilateral where diagonals bisect at right angles.
In geometry, they learned that a diamond's diagonals intersect perpendicularly.


Can have non-parallel sides of unequal length.
The trapezoid-shaped lot was challenging for builders.


A shape often used in jewelry design.
The diamond pattern was prominently featured in the necklace.


Unique among quadrilaterals for its parallel sides.
The trapezoid was used as a base for the sculpture.


Equal-sided parallelogram but not necessarily a rectangle.
The diamond-shaped kite soared high in the sky.


Area is calculated differently than other quadrilaterals.
Calculating the area of the trapezoid required some thought.


A four-sided figure with equal sides.
The shape of her ring was a perfect diamond.


A quadrilateral with only one pair of parallel sides.
They cut the paper into a trapezoid for the craft project.


Has all sides of equal length but angles can vary.
The diamond sign warned of a crossroads ahead.


Can be asymmetrical in shape.
The artist drew a trapezoid that was noticeably asymmetrical.


An extremely hard, highly refractive crystalline form of carbon that is usually colorless and is used as a gemstone and in abrasives, cutting tools, and other applications.


A quadrilateral having two parallel sides.


A piece of jewelry containing such a gemstone.


Chiefly British A trapezium.


What defines a diamond shape?

A quadrilateral with all sides equal and angles that can vary.

Is a diamond a type of parallelogram?

Yes, a diamond is a special type of parallelogram.

Can a trapezoid be symmetrical?

Yes, but not all trapezoids are symmetrical.

What shapes can a trapezoid take?

Trapezoids can be regular or irregular in shape.

Is a square a type of diamond?

Yes, a square can be considered a type of diamond.

How are the diagonals of a diamond positioned?

They bisect each other at right angles.

Are all angles in a diamond right angles?

No, diamonds do not necessarily have right angles.

How many parallel sides does a trapezoid have?

A trapezoid has one pair of parallel sides.

Is it possible for a trapezoid to have right angles?

Yes, some trapezoids can have right angles.

What are the angle properties of a trapezoid?

The angles on the parallel sides of a trapezoid can be equal.

What distinguishes a trapezoid from other quadrilaterals?

Its single pair of parallel sides.

What is the area formula for a trapezoid?

Average the lengths of the parallel sides and multiply by the height.

Are all sides of a trapezoid always unequal?

No, in an isosceles trapezoid, the non-parallel sides are equal.

Can a trapezoid be classified as a parallelogram?

No, a trapezoid is distinct from a parallelogram due to its single pair of parallel sides.

Are the non-parallel sides of a trapezoid equal?

Not necessarily; they can be of different lengths.

Can diamonds have obtuse angles?

Yes, diamonds can have obtuse angles.

Are diamonds always symmetrical?

Yes, diamonds are always symmetrical.

Can a diamond be a rhombus?

Yes, a diamond is often another term for a rhombus.

What is a right-angled trapezoid?

A trapezoid with one or two right angles.

How is the area of a diamond calculated?

By multiplying the lengths of the diagonals and dividing by two.
About Author
Written by
Harlon Moss
Harlon is a seasoned quality moderator and accomplished content writer for Difference Wiki. An alumnus of the prestigious University of California, he earned his degree in Computer Science. Leveraging his academic background, Harlon brings a meticulous and informed perspective to his work, ensuring content accuracy and excellence.
Edited by
Aimie Carlson
Aimie Carlson, holding a master's degree in English literature, is a fervent English language enthusiast. She lends her writing talents to Difference Wiki, a prominent website that specializes in comparisons, offering readers insightful analyses that both captivate and inform.

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