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Not all things with four sides and 90 degree angles are squares or rectangles! Sometimes the angles in these 4-sided shapes are less than (or greater than) 90 degrees, causing them to have a slightly odd shape. These are called quadrilaterals and come in a few different varieties. In this tutorial, you'll learn about them. Common Core Standards: 5.G.B.3, 5.G.B.4

4068_Quadrilateral_types.html

4070_Kites_as_a_geometric_shape.html

4067_Quadrilateral_properties.html

4066_Intro_to_quadrilateral.html

4069_Classifying_quadrilaterals.html