Activity
The Math League

The Math League: Area and Perimeter

For Students 9th - 10th Standards
This tutorial provides a brief introduction about what area is, then gives the formulas for area of a square, rectangle, parallelogram, trapezoid, triangle, and circle. Examples of each formula are provided.
Unknown Type
Math Slice

Math Slice: Area & Perimeter: Math Worksheets

For Students 3rd - 5th Standards
This tool allows you to create worksheets of word problems at varying levels of difficulty where students must calculate the area or perimeter of different polygon shapes. You can choose to set up the page using any of these polygon...
Activity
University of Cambridge

University of Cambridge: Nrich: Making Rectangles

For Students 1st - 2nd Standards
On this one page website sharpen your logicand pattern recognition skills while working on this rectangle challenge. The solution is available to double check your solution.
Unit Plan
CK-12 Foundation

Ck 12: Elem Math: Areas of Rectangular Composite Figures Overlap 2

For Students 3rd - 5th Standards
[Free Registration/Login may be required to access all resource tools.] A video and practice questions where students are presented with a rectangle that has shaded areas. They must calculate the area of the unshaded region. [1:48]
Lesson Plan
University of Texas at Austin

Mathematics Teks Toolkit: Pipe Cleaners

For Teachers 6th - 8th
Pipe cleaners are used to create the perimeter of a rectangle in order to explore base and height.
Unknown Type
Khan Academy

Khan Academy: Find a Missing Side Length When Given Area of a Rectangle

For Students 3rd - 5th
In this exercise, students find a missing side length when given area of a rectangle. Students receive immediate feedback and have the opportunity to get hints and try questions repeatedly.
Lesson Plan
Alabama Learning Exchange

Alex: Learning From Limbo

For Teachers 3rd - 5th
Using a limbo set, young scholars will participate in learning about perimeter and area of a rectangle. Students will explore how the area and perimeter changes as the limbo pole is lowered. This lesson plan was created by exemplary...
Website
PBS

Pbs Learning Media: Skate Off: Round One

For Students 6th - 8th
In this Cyberchase video segment, the CyberSquad learns what happens to the area of a rectangle when the shape enclosed by the perimeter changes.
Interactive
National Council of Teachers of Mathematics

Nctm: Illuminations: Scale Factor

For Students 3rd - 8th Standards
The interactive applet allows learners to explore the relationships between side length, area, and perimeter. Students see how changes in the scale factor influence the ratio of areas and perimeters. [Requires Java.]
Interactive
Shodor Education Foundation

Shodor Interactivate: Shape Builder

For Students 9th - 10th Standards
This activity operates in one of two modes: auto draw and create shape mode, allowing you to explore relationships between area and perimeter.
Activity
Texas Instruments

Texas Instruments: Greatest Area Activity

For Teachers 6th - 8th
A classic problem looking at maximizing the area of rectangles given fixed perimeters. Uses graphing calculators to analyze data collected and to model a parabolic equation. Compiling class data provides a preliminary glance at families...
Interactive
Calculator Soup

Calculator Soup: Rectangle Calculator

For Students 9th - 10th
Use this calculator if you know 2 values for the rectangle, including 1 side length, along with area, perimeter, or diagonals and you can calculate the other 3 rectangle variables. A square calculator is a special case of the rectangle...
Whiteboard
ClassFlow

Class Flow: Area Rectangle

For Teachers 3rd - 8th Standards
[Free Registration/Login Required] This flipchart will help students to solve the area for various rectangles on graph paper. It asks the students to define and solve for area using the appropriate formula.
Whiteboard
ClassFlow

Class Flow: Area Rectangles

For Teachers 3rd - 8th Standards
[Free Registration/Login Required] In this lesson students will understand area measured in square centimeters. They will understand and use the formula in words for the area of a rectangle.
Handout
Math Open Reference

Math Open Reference: Area of a Rectangle

For Students 9th - 10th Standards
Learn about the area of a rectangle with this helpful reference tool. Provides a detailed definition and interactive activities that enhance further explanation. Includes links to related topics.
Interactive
Mangahigh

Mangahigh: Shape: Find the Area of a Rectangle

For Students 5th - 7th Standards
Calculate the area of a rectangle.
Unit Plan
University of Cambridge

University of Cambridge: Nrich: Fencing

For Students 3rd - 8th
On this one page website sharpen your logic, area, perimeter, and pattern recognition skills while working on this unique fencing challenge. The solution is available to double check your solution.
Handout
Homeschool Math

Homeschool Math: Area of Right Triangles

For Students 6th - 8th
This lesson presents the idea that the area of any right triangle is exactly half of a certain rectangle, and contains varied exercises for students.
Lesson Plan
Homeschool Math

Homeschool Math: Area of Parallelograms

For Teachers 6th - 7th Standards
This lesson presents the idea that the area of any right triangle is exactly half of a certain rectangle, and contains varied exercises for students.
Unit Plan
Khan Academy

Khan Academy: Transition From Unit Squares to Area Formula

For Students 2nd - 4th Standards
Find the area of rectangles by multiplying side-lengths. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Unit Plan
Khan Academy

Khan Academy: Find a Missing Side Length When Given Area

For Students 2nd - 4th Standards
Practice finding a missing side length on a rectangle when given the other side length and the area. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Handout
Homeschool Math

Homeschool Math: Fraction Multiplication and Area

For Students 4th - 6th Standards
This fifth-grade lesson explores the area of a rectangle with fractional side lengths. We tile the rectangle with unit rectangles and show that the area is the same as would be found by multiplying the side lengths. We multiply...
Activity
Jim Loy

Jl's Math Page: The Golden Rectangle and the Golden Ratio

For Students 9th - 10th
This is a personal site from Jim Loy that describes the golden rectangle and the golden ratio. Includes several diagrams and pictures as well as formulas. A good background in math is helpful.
Unit Plan
CK-12 Foundation

Ck 12: Geometry: Unknown Dimensions Using Formulas Grade 7

For Students 7th
[Free Registration/Login may be required to access all resource tools.] Given a perimeter or area of a figure, use formulas to solve for the unknown or missing dimensions.

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