Wednesday, February 20, 2013

Quizzical Quadrilaterals!

In our polygon unit we are learning about four-sided figures called


Quadrilateral just means "four sides"
(quad means four, lateral means side).
Any four-sided shape is a Quadrilateral.
But the sides have to be straight, and it has to be 2-dimensional.

Many people were confused about why some shapes have more than one name. Here are some interactive quadrilaterals to help you explore and learn more! 
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What is a trapezoid?

Here is an interactive trapezoid. 

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What is a parallelogram?

Here is an interactive parallelogram.

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What is a rectangle?

Here is an interactive rectangle.

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What is a rhombus?

Here is an interactive rhombus.

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What is a square?

Here is an interactive square.

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Choose a quadrilateral and describe 
its characteristics in your comment!

What quadrilaterals have you seen 
in your house or community?


  1. Dear Mrs. Ranney,

    The door to my room is a rectangle, and most of my books are rectangular too. A rectangle has four right angles. A rectangle has two pairs of parallel sides. A rectangle has two pairs of sides that are equal in length. A rectangle is a special kind of parallelogram. It is also a special kind of quadrilateral.

    Rain & Eilat

  2. Dear Mrs. Ranney,

    I found square on the poster hanging in my room. A square has two pairs of parallel sides. It has four sides of equal length. It has four right angles. A square is a special type of a parallelogram, a special type of rhombus, and a special type of rectangle.

    I think a square is the most important shape. Do you agree?

    Rain and Eilat

    1. Andrea and CharlotteFebruary 22, 2013 at 4:47 PM

      Dear Rain and Eilat,

      My mom and I also think a square is the most important shape, because a square is also a rectangle, parallelogram, rhombus, and a quadrilateral. Everywhere you look things are squares (mostly). While we are blogging, we see a TV, and it is a rectangle, which is a type of square. We just realized the computer we are typing this blog comment on is also a rectangle!

      Does anyone else have rectangles in their house?

      Andrea and Charlotte

  3. Dear Mrs. Ranney and class,

    Isn't it amazing how many quadrilaterals we can find when we keeps our minds and eyes open to the world around us?

    From brick pavers and bricks in walls to shop windows and signs, from books on shelves to desptops, we see quadrilaterals but don't realise what they are until we stop and think. As I look around my room, I see many quadrilaterals where once I just saw only objects.

    Rain, Eilat, Andrea and Charlotte, I can tell you have kept your minds and eyes open. I can also see squares and rectangles amongst the quadrilaterals. Well done. :)

    Teacher (retired), N.S.W., Australia


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