# Quadrilaterals

5 videos
2 skills
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

### Intro to quadrilateral

VIDEO 8:24 minutes
Sal introduces the term quadrilateral as well as trapezoid, parallelogram, rectangle, rhombus, and square.

### Quadrilateral properties

VIDEO 5:07 minutes
Sal discusses the properties of quadrilaterals, parallelograms, trapezoids, rhombuses, rectangles, and squares.

### Kites as a geometric shape

VIDEO 5:38 minutes
Sal discusses a special type of quadrilateral, the kite.

### Quadrilateral types

VIDEO 2:49 minutes
Sal identifies quadrilaterals as kites, trapezoids, parallelograms, rhombuses, rectangles, and squares.

### Quadrilateral types

PRACTICE PROBLEMS
Identify quadrilaterals based on pictures or attributes. Quadrilaterals included are parallelograms, rhombuses, rectangles, and squares.

### Classifying quadrilaterals

VIDEO 2:28 minutes
Sal classifies quadrilaterals by their properties (such as parallel sides).

### Properties of shapes

PRACTICE PROBLEMS
Identify and compare shapes based on their attributes. Shapes include triangle types, quadrilateral types, pentagons, and hexagons.