Interactive
National Council of Teachers of Mathematics

Nctm: Illuminations: Igd: Area of a Rectangle

For Students 3rd - 8th Standards
Use this interactive tool to learn how to find the area of a rectangle. Click on "Instructions" for details on how to use this tool. Click on "Explore" for more ideas.
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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.
Interactive
Mangahigh

Mangahigh: Shape: Find the Area of a Rectangle

For Students 5th - 7th Standards
Calculate the area of a rectangle.
Interactive
Mangahigh

Mangahigh: Shape: Area of a Rectangle

For Students 4th - 7th Standards
Determine the area of a rectangle by multiplying the sides.
Lesson Plan
Google

Google for Education: Area of a Circle

For Teachers 9th - 10th
Students learn to derive the formula for the area of a circle. They learn to relate a circle to a parallelogram and rectangle while learning the concept of infinity as they imagine slicing an circle into infinitesimally small slices.
Activity
Texas Instruments

Texas Instruments: Maximizing the Area of a Rectangle

For Teachers 9th - 10th
This activity is adapted from one of the TI books. Students measure lengths and widths of rectangles and record for the class to see. Each group's rectangle has the same perimeter, but different areas. After a discussion, students make...
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.
Unit Plan
Discovery Education

Discovery Education: Web Math: Find Out Things About a Rectangle

For Students 9th - 10th
WebMath offers a good, basic site for students to practice working with the area and perimeter of a rectangle.
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McGraw Hill

Glencoe: Self Check Quizzes 1 Geometry Area of Rectangles

For Students 9th - 10th
Use Glencoe's randomly generated self-checking quiz to test your knowledge of finding the area of rectangles. Each question has a "Hint" link to help. Choose the correct answer for each problem. At the bottom of the page click the "Check...
Interactive
Amby Duncan-Carr

Amby's Math Resources: Finding the Area of a Rectangle

For Students 3rd - 7th Standards
The tutorial investigates area and how it is the total number of square tiles covered. Examples and practice problems are included.
Activity
Texas Instruments

Texas Instruments: Perimeter of a Rectangle With Fixed Area

For Teachers 9th - 10th
Students will investigate the relationship between the base of a rectangle with area of 35 or 36 and its perimeter.
Study Guide
Oswego City School District

Regents Exam Prep Center: Area of Polygons and Circles

For Teachers 3rd - 6th Standards
How would you find the area of a polygon or circle? Explore this concept with engaging activities at this test prep site. Here you will find detailed problem solving strategies with accompanying visuals, a reference table with formulas,...
Activity
National Council of Teachers of Mathematics

The Math Forum: Find the Area of the Shape!

For Students 3rd - 8th Standards
Try to figure out the area of this challenging shape. In order to view the images, you will need to use JavaSketchpad.
Unit Plan
CK-12 Foundation

Ck 12: Geometry: Area of a Parallelogram

For Students 6th - 8th
[Free Registration/Login may be required to access all resource tools.] In this lesson students find the area of a parallelogram given its base and height. Students examine guided notes, review guided practice, watch instructional videos...
Interactive
PBS

Pbs Learning Media: Kid Vid: Scaling Up Rectangles

For Students 6th - 8th Standards
Watch a student think through a problem about how the area of a rectangle changes when both sides are increased by the same scale factor and use online tools to demonstrate understanding of concepts related to area and scale factors in...
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]
Unit Plan
CK-12 Foundation

Ck 12: Elem Math: Areas of Rectangular Composite Figures Overlap 1

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 one or more smaller rectangles within a larger one. They must calculate the area of the larger...
Interactive
Government of Alberta

Learn Alberta: Math Interactives: Exploring Area and Perimeter

For Students 6th - 8th
This multimedia Learn Alberta math resource looks at area and perimeter and how math is involved in the operations of a ranch. The accompanying interactive component lets students investigate a variety of rectangles to get a target...
Unit Plan
Khan Academy

Khan Academy: Area of Rectangles With Fraction Side Lengths

For Students 4th - 6th Standards
Practice computing the areas of rectangles that have fractional side lengths. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Unit Plan
Wolfram Research

Wolfram Math World: Rectangle

For Students 9th - 10th
MathWorld provides the definition of a rectangle and the area formula of a rectangle.
Handout
Wolfram Research

Wolfram Math World: Area

For Students 9th - 10th Standards
Definitions and formulas for the computation of surface areas of triangles, rectangles, and any regular polygon. Helpful links to related pages.
Unit Plan
CK-12 Foundation

Ck 12: Elem Math: Partitioning Composite Figures Into Rectangles to Find Area 1

For Students 3rd - 5th Standards
[Free Registration/Login may be required to access all resource tools.] In this learning module, students are asked to partition a shape into rectangles and add their areas together to get the area of the whole figure. Includes video...
Unit Plan
Khan Academy

Khan Academy: Area of Rectangles

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

Alex: Learning From Limbo

For Teachers 3rd - 5th
Using a limbo set, students 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 Alabama...