Curated OER
How Do You Find the Width of a Rectangle if You Know its Length and Perimeter?
Use the formula for the perimeter of a rectangle to find the value of the width. Plug the given values of the perimeter and the length into the formula and solve. It is as easy as it looks.
Curated OER
What's the Formula for the Perimeter of a Rectangle?
Follow along and learn the steps of how to prove the formula for the perimeter of a rectangle.
Khan Academy
Khan Academy: Geometry: Challenging Perimeter Problem
Demonstrates how to solve a problem from the 2000 American Invitational Mathematics Examination which involves finding the perimeter of a rectangle covered by nine overlapping squares. [9:56]
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]
Khan Academy
Khan Academy: Algebra: Application Problems With Equation in One Variable
A video that demonstrates how to solve a perimeter word problem only in terms of width. A diagram is drawn to help explain the equation used. [2:01]
Khan Academy
Khan Academy: Interesting Perimeter and Area Problems
Demonstrates how to solve three different area and perimeter problems which appear to not have enough information to solve. [8:13]
CK-12 Foundation
Ck 12: Elem Math: Overview of Perimeter
[Free Registration/Login may be required to access all resource tools.] The video defines perimeter and uses a grid to count the perimeter of given shapes, followed by an example of adding the sides to find the perimeter.
Math Mammoth
Math Mammoth: Learn About Feet, Yards, and Miles: Measurement Lesson
Models how to measure and calculate length, area, and perimeter using inches, feet, yards, and miles, and how to do simple conversions between units. [8:39]
Khan Academy
Khan Academy: Perimeter, Circumference and Area Basics: Area and Perimeter
Explains how to calculate the area of rectangles, squares, and triangles, in addition to the perimeter of rectangles and squares.
Virtual Nerd
Virtual Nerd: How Do You Find the Perimeter of a Shape?
The perimeter is the distance around an object. Watch this tutorial to learn how to find the perimeter of a shape. [3:36]
Math Playground
Math Playground: Can Shapes With the Same Area Have Different Perimeters?
This video answers the question about the relationship between area and perimeter. Can shapes with the same area have different perimeters?
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.
Virtual Nerd
Virtual Nerd: How Do You Find the Perimeter of a Rectangle in a Coordinate Plane
How do you find the perimeter of a rectangle on a coordinate plane? This video will walk you through the process of using the coordinate plan to find the perimeter. [4:58]
Khan Academy
Khan Academy: Geometry: Perimeter of a Polygon
Shows how to find the perimeter of a parallelogram. [1:20]
Khan Academy
Khan Academy: Algebra I Worked Examples: Solving for a Variable
The video resource [6:58] shows worked examples of algebra concepts. Students watch a detailed problem on how to solve for a variable of the perimeter formula.
Khan Academy
Khan Academy: Solving for a Variable: Example: Solving for a Variable
In this video students watch a detailed problem on how to solve for a variable of the perimeter formula.
Sophia Learning
Sophia: Calculating the Perimeter of a Rectangle
This video tutorial explores perimeter of rectangles. The lesson shows how to use the perimeter formula. [2:56] Students can check their understanding with an assessment.
Sophia Learning
Sophia: Calculating the Perimeter of a Rectangle
This video lesson demonstrates how to calculate the perimeter of a rectangle using a formula. It includes several examples. Students can check their understanding with an assessment. [3:12]
Sophia Learning
Sophia: Calculating the Perimeter of a Rectangle
This video lesson [4:24] demonstrates how to find the perimeter of a rectangle. Students can check their understanding with an assessment.
Sophia Learning
Sophia: Calculating the Perimeter of a Triangle
This video lesson demonstrates how to find the perimeter of triangles. [3:42] The tutorial includes detailed examples. Students can check their understanding with an assessment.
Sophia Learning
Sophia: Similar Polygons and Their Perimeters
Multiply the perimeter of a smaller polygon by the scale factor to determine if polygons are similar in this video tutorial. [2:16] Assess learning with a quiz.
Sophia Learning
Sophia: Similar Polygons and Their Perimeters
Explore the relationship between similar polygons and the ratio of their perimeters. Assess learning with a quiz.