3.G.1. Understand that shapes in different categories (e.g., rhombuses, rectangles, and others) may share attributes (e.g., having four sides), and that the shared attributes can define a larger category (e.g., quadrilaterals). Recognize rhombuses, rectangles, and squares as examples of quadrilaterals, and draw examples of quadrilaterals that do not belong to any of these subcategories.
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Category Videos

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Ages: 5  8
2556 Views:

Learn about rectangles, parallelograms, right angles and polygons. Use parallel segments to make a rectangular tree house.
June 16, 2012 at 10:57 PM


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Ages: 6  12
4102 Views:

Mrs. Rice and her friends review some basic geometric shapes for thirdgraders. Some of the shapes reviewed are circle, square, triangle, rectangle, rhombus, trapezoid, quadrilateral, and parallelogram. This is a great resource to help students maste...r this important skill. (04:02)
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June 25, 2012 at 10:19 PM


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Ages: 12  16
4598 Views:

In this slide show properties of quadrilaterals are explored and several examples modeling problems involving quadrilaterals are worked out. This slide show is from Glencoe McGraw Hill.
July 30, 2009 at 12:41 PM


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Ages: 3  12
6082 Views:

This video helps students boost math skills and score high on tests. Students learn how to read problems carefully, identify relevant information, use pictures and diagrams, and look for patterns. (01:52)
November 24, 2010 at 07:01 PM


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Ages: 6  12
6620 Views:

The Math Cheerleaders present some songs and cheers about fractions, geometry, and measurement. The cheers are catchy and will help kids memorize math concepts while having fun. This is a great resource to help students master these important skills.... (10:23)
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June 25, 2012 at 10:02 PM


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Ages: 11  18
3380 Views:

This lesson emphasizes the properties of the quadrilaterals in the hierarchy including parallelograms, rhombi, rectangles, squares, kites and trapezoids. Venn diagrams are used to show the relationship among the figures.
July 17, 2012 at 03:08 PM


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Ages: 5  9
4590 Views:

Identify the properties of two dimensional figures using appropriate terminology.
June 16, 2012 at 11:36 PM


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Ages: 9  13
3292 Views:

Classify polygons by their attributes. (e.g., number of sides, length of sides, angles, parallelism, perpendicularity)
June 18, 2012 at 10:37 PM


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Ages: 7  12
1559 Views:

In this Cyberchase video segment, Matt and Jackie must figure out how to construct rectangular lids that match the size of two boxes precisely. They enlist the carpentry skills of one of the Three Little Pigs, who shows them how to use different tool...s to accurately measure the rectangular lids. For the first box, Jackie finds that she can easily trace the box to make a lid that fits perfectly. The second box cannot be traced, so Matt and Jackie decide to measure the sides of the box and then use the measurements to cut a rectangle of equal size out of a piece of Herculanium. (4:11)
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February 24, 2012 at 11:12 PM


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Ages: 6  12
13265 Views:

This is an amusing, amateur production that uses a bobblehead to 'sing' a song about the definition of quadrilaterals. (02:19)
March 27, 2010 at 03:18 PM
