Art of Problem Solving
Why Do People Say that Repeated Addition is Multiplication?
Is a repeated addition definition mathematically valid? Using mathematical properties, a video explains why, even though there is a connection between repeated addition and multiplication, it is not a good definition. The properties hold...
Virtual Nerd
How Do You Find the Area of a Rectangle?
Area=length x width. Locate the value of the length of the rectangle and locate the given width and plug them in to solve. Don't forget to include the units and multiply them too. This three-minute video can be watched at home to review...
Khan Academy
Khan Academy: Geometry: Area and Perimeter
Explains how to calculate the area of rectangles, squares, and triangles, in addition to the perimeter of rectangles and squares. Practice problems available. [12:20]
CK-12 Foundation
Ck 12: Elem Math: Overview of Ellipses Trapezoids Rhombi and Polygons
[Free Registration/Login may be required to access all resource tools.] The video draws and defines an ellipse, trapezoid, rhombus, and polygon.
Math Mammoth
Math Mammoth: Area and Perimeter Problems: Rectangular Shapes
Demonstrates how to solve problems where one is asked to determine the area and perimeter of rectangles or to draw rectangles with given measurements. [9:39]
CK-12 Foundation
Ck 12: Elem Math: Overview of Area and Perimeter
[Free Registration/Login may be required to access all resource tools.] Students watch a video overview on the area and perimeter of squares and rectangles.
CK-12 Foundation
Ck 12: Elem Math: Overview of Area and Perimeter of Rectangle
[Free Registration/Login may be required to access all resource tools.] Students watch a video overview on how to find the area and perimeter of a rectangle.
CK-12 Foundation
Ck 12: Elem Math: Overview of Area and Perimeter of Squares
[Free Registration/Login may be required to access all resource tools.] Students watch a video overview on how to find the area and perimeter of squares.
CK-12 Foundation
Ck 12: Elem Math: Overview of Squares and Rectangles
[Free Registration/Login may be required to access all resource tools.] Students watch a video overview on the properties of squares and rectangles.
CK-12 Foundation
Ck 12: Elem Math: Overview of Composite Figures Made of Squares and Rectangles
[Free Registration/Login may be required to access all resource tools.] Video explaining two ways of finding the area of an irregular shape that is composed of two rectangles. [0:51]
Khan Academy
Khan Academy: Intro to Area and Unit Squares
Models how to find the area of shapes that have only right angles by covering them with square units. [4:17]
Khan Academy
Khan Academy: Geometry: Perimeter of a Polygon
Shows how to find the perimeter of a parallelogram. [1:20]
Imagine Learning Classroom
Learn Zillion: Find Area by Breaking Down a Rectangle Into Smaller Rectangles
In this lesson, you will learn how to find the area of a rectangle or square by breaking it into smaller rectangles. [4:11]
Imagine Learning Classroom
Learn Zillion: Find the Perimeter of a Square or Rectangle by Adding Side Lengths
In this lesson, you will learn how to find the perimeter of a square or rectangle by adding the side lengths. [3:14]
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: Perimeter and Area: Perimeter and Area Basics
This video describes how to calculate area and perimeter of rectangles and squares.
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.
Loyola University Chicago
Math Flix: Formula Area of a Parallelogram
This QuickTime movie explains how to find the area of a parallelogram by developing an area formula and then demonstrates this by showing how to use the area formula. As you watch and listen to the teacher and student interact it helps...
Loyola University Chicago
Math Flix: Formula Area of a Rectangle Part 2
This QuickTime movie explains how to find the area of a rectangle by developing an area formula. As you watch and listen to the teacher and student interact it helps clarify the thinking behind applying this concept.
Khan Academy
Khan Academy: Decomposing Shapes to Find Area: Subtract
Demonstrates how to find the area of a rectangular shape enclosed by another rectangle and with a third one inside it. [3:12]
Khan Academy
Khan Academy: Measuring Area With Partial Unit Squares
Models how to find the area of a shape on a grid that has different angle sizes by counting both square and partial units. [3:16]
Khan Academy
Khan Academy: Decomposing Shapes to Find Area: Add
Demonstrates how to break an irregular shape into three rectangles, find the individual areas, and then add them together. [3:36]
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: Comparing Areas and Perimeters of Rectangles
Sal compares the areas and perimeters of rectangles to a given rectangle.