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One example of a quadrilateral that is not a rectangle is a rhombus, the shape of a diamond
The reason we know it's a quadrilateral is because we can count out it's four sides. We know it is not a rectangle since rectangles should have four right angles, but a rhombus has two acute and two obtuse angles. That means it is not a rectangle!
Hope this helped! :)
The reason we know it's a quadrilateral is because we can count out it's four sides. We know it is not a rectangle since rectangles should have four right angles, but a rhombus has two acute and two obtuse angles. That means it is not a rectangle!
Hope this helped! :)

A parallelogram also has 4 sides and its opposite sides are equal. What differentiates this shape from a rectangle is that none of the interior angles are 90 degrees.
What are quadrilaterals?
Quadrilaterals are 2-dimensional figures having 4 sides and angles. For instance, a rectangle is an example of a quadrilateral.
A rectangle has all its interior angles to be 90 degrees. Also, the opposite sides of the rectangle are equal.
Another example of a quadrilateral that is NOT a rectangle is a parallelogram.
What are parallelograms?
A parallelogram also has 4 sides and its opposite sides are equal. What differentiates this shape from a rectangle is that none of the interior angles are 90 degrees.
Learn more on quadrilaterals here: https://brainly.com/question/23935806