IXL | Classify quadrilaterals

Select all the rectangles.

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Learn with an example

question

Select all the rectangles.

key idea

A rectangle is a quadrilateral with four right angles. A quadrilateral is a shape with four sides.

A right angle looks like the corner of a square. An acute angle is less than a right angle. An obtuse angle is greater than a right angle.

Acute angle

Right angle

Obtuse angle

Right angles are usually marked with a special symbol. This symbol looks like a small square placed in the angle.

solution

The shapes are all quadrilaterals. To see which quadrilaterals are rectangles, find the ones with four right angles. Imagine placing a small square in each angle, to see how it fits.

This quadrilateral has no right angles.

Not right angles

So, it is not a

rectangle.

This quadrilateral has four right angles.

Four right angles

So, it is a

rectangle.

This quadrilateral has no right angles.

Not right angles

So, it is not a

rectangle.

Looking for more? Try these:

Lesson: Types of quadrilaterals

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Teacher tools

Work it out

Not feeling ready yet? These can help:

MM.3Identify parallelograms

MM.4Identify trapezoids

MM.5Identify rectangles

MM.6Identify rhombuses

TT.8Classify squares, rectangles, rhombuses, parallelograms, and trapezoids

Lesson: Types of quadrilaterals

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