Virtual Nerd
Virtual Nerd: How Do You Classify Quadrilaterals?
Quadrilaterals are figures with four sides and there are many different types. Watch this tutorial and try to figure out the name for any given quadrilateral. [11:03]
Virtual Nerd
Virtual Nerd: How Do You Find Missing Angles in a Quadrilateral With Variables?
Watch this tutorial to learn how to create an equation and solve it to find the missing measurements of the interior angles of a polygon. [5:32]
Math Antics
Math Antics: Quadrilaterals
Gain a basic understanding of quadrilaterals by watching this easy to understand video tutorial. Additional resources are available as part of a paid subscription service. [9:49]
Khan Academy
Khan Academy: Quadrilaterals: Area of a Parallelogram
Showing that the area of a parallelogram is base times height.
Khan Academy
Khan Academy: Geometry: Proof: Diagonals of Parallelogram Bisect Each Other
Demonstrates how to prove that the diagonals of a parallelogram bisect each other based on knowledge of the special angles created when parallel lines are cut by a transversal and the triangle congruency postulates. [9:06]
CK-12 Foundation
Ck 12: Elem Math: Overview of Quadrilaterals
[Free Registration/Login may be required to access all resource tools.] Students watch a video overview on the properties of various quadrilaterals.
Art of Problem Solving
Art of Problem Solving: Angles in a Polygon Part 1
Video tutorial uses examples to reinforce understanding of how the sum of the angles in a polygon always adds up to 360 degrees. [5:09]
Khan Academy
Khan Academy: Quadrilateral Properties
Looks at the different types of quadrilaterals and what the properties of each are. [5:07]
CK-12 Foundation
Ck 12: Elem Math: Overview of Area of Squares and Rectangles Word Problems
[Free Registration/Login may be required to access all resource tools.] Students watch a video overview on how to find the area of a square and rectangle.
Khan Academy
Khan Academy: Intro to Quadrilaterals
Sal Khan discovers attributes and features of four-sided shapes, including parallelograms, rhombuses, rectangles, and squares. [8:06]
Khan Academy
Khan Academy: Intro to Quadrilateral
Learn the term quadrilateral as well as trapezoid, parallelogram, rectangle, rhombus, and square.
Khan Academy
Khan Academy: Kites as a Geometric Shape
Sal discusses a special type of quadrilateral, the kite.
Khan Academy
Khan Academy: Classifying Quadrilaterals
Sal classifies quadrilaterals by their properties (such as parallel sides).
Khan Academy
Khan Academy: Whether a Special Quadrilateral Can Exist
Proving whether a special quadrilateral can exist or not.
Sophia Learning
Sophia: Corresponding Parts: Lesson 1
This lesson [2:00] will define the phrase corresponding parts (e.g. angles, sides, etc.). It is 1 of 5 in the series titled "Corresponding Parts."
Sophia Learning
Sophia: Trapezoid: Lesson 4
This lesson explains the definition, components, and notations involved in a trapezoid. It is 4 of 7 in the series titled "Trapezoid."
Sophia Learning
Sophia: Trapezoid: Lesson 7
This lesson explains the definition, components, and notations involved in a trapezoid. It is 7 of 7 in the series titled "Trapezoid."
Sophia Learning
Sophia: Using Triangles to Examine Quadrilaterals
This lesson demonstrates how to determine properties of quadrilaterals by using triangles.
Sophia Learning
Sophia: Corresponding Parts: Lesson 3
This lesson [6:07] will define the phrase corresponding parts (e.g. angles, sides, etc.). It is 3 of 5 in the series titled "Corresponding Parts."
Sophia Learning
Sophia: Rhombus: Lesson 4
This lesson explains the definition, components, and notations involved in a rhombus. It is 4 of 6 in the series titled "Rhombus."
Sophia Learning
Sophia: Trapezoid: Lesson 6
This lesson explains the definition, components, and notations involved in a trapezoid. It is 6 of 7 in the series titled "Trapezoid."
Khan Academy
Khan Academy: Classifying Quadrilaterals
Demonstrates how to decide which quadrilaterals match a set of given properties. [2:28]
Other
Corbettmaths: Names of Quadrilaterals Video 2
Video tutorial discusses 6 types of quadrilaterals: square, rectangle, rhombus, parallelogram, trapezium, and kite. [3:21]