# Similarities & Differences of Quadrilaterals

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• 1:50 Finding Similarities
• 2:30 Finding Differences
• 2:50 Lesson Summary
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Lesson Transcript
Instructor: Yuanxin (Amy) Yang Alcocer

Amy has a master's degree in secondary education and has taught math at a public charter high school.

Watch this video lesson to learn how you can find similarities and differences between two quadrilaterals. Learn what aspects of the quadrilaterals you need to focus on to find the similarities and differences.

In this lesson, we will talk about finding the similarities and differences between two quadrilaterals. A quadrilateral is a polygon with four sides. Polygons are two-dimensional shapes with straight sides. So, you can draw all kinds of quadrilaterals on paper by connecting four straight lines to each other. Just make sure you connect them end to end so that your quadrilateral makes up a room of sorts.

There are certain quadrilaterals with special names. We have rectangles, squares, parallelograms, trapezoids, diamonds, kites, and rhombuses. All of these have special characteristics that are unique to each shape. For example, the square has four sides that are all the same length. The rectangle has two pairs of parallel sides that are different lengths.

When we start to compare and contrast quadrilaterals, we find that some of these special characteristics are the same while others are completely different. For example, the square and the rectangle have different side lengths, but both have four 90-degree angles. As you can see, in order for us to be able to find similarities and differences between two quadrilaterals, we need to know the special characteristics of our special quadrilaterals.

Let's find the similarities and then the differences of these two quadrilaterals.

Do you recognize these two shapes by looking at them? Yes, we have a square and a trapezoid. What special characteristics do these two quadrilaterals have? A square has four 90-degree angles, four sides that are all equal, and two pairs of parallel sides. The trapezoid has two sides that are parallel to each other.

## Finding Similarities

Now that we know that special characteristics each shape has, we can now begin to find similarities and differences between them.

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