If you're seeing this message, it means we're having trouble loading external resources for Khan Academy.
If you're behind a web filter, please make sure that the domains
*.kastatic.org and *.kasandbox.org are unblocked.
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
Sal introduces the term quadrilateral as well as trapezoid, parallelogram, rectangle, rhombus, and square.
Sal discusses the properties of quadrilaterals, parallelograms, trapezoids, rhombuses, rectangles, and squares.
Sal discusses a special type of quadrilateral, the kite.
Sal identifies quadrilaterals as kites, trapezoids, parallelograms, rhombuses, rectangles, and squares.
Identify quadrilaterals based on pictures or attributes. Quadrilaterals included are parallelograms, rhombuses, rectangles, and squares.
Sal classifies quadrilaterals by their properties (such as parallel sides).
Identify and compare shapes based on their attributes. Shapes include triangle types, quadrilateral types, pentagons, and hexagons.