Handout
CK-12 Foundation

Ck 12: Geometry: Triangles and Quadrilaterals Study Guide

For Students 9th - 10th Standards
[Free Registration/Login may be required to access all resource tools.] This study guide reviews the formulas for area and perimeter of triangles and different kinds of quadrilaterals.
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.
Activity
National Council of Teachers of Mathematics

Nctm: Figure This: Patios

For Students 3rd - 8th Standards
Does bigger perimeter mean bigger area? Answer this question when you try this math challenge from the NCTM Math Challenges for Families series. Discover how understanding area and perimeter can be useful in real world situations.
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...
eBook
Other

Algebra Lab: Areas and Perimeters of Triangles and Special Quadrilaterals

For Students 6th - 7th Standards
Learn how to find the areas and perimeters of triangles and special quadrilaterals.
Activity
Texas Instruments

Texas Instruments: Math Today Wildfires Nearly Snuffed

For Teachers 9th - 10th Standards
Students can use the data to explore the relationship between area and perimeter for rectangles and circles and they will make generalizations about the shape of the rectangle that will produce the smallest perimeter.
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.
Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: 6.rp Converting Square Units

For Teachers 6th Standards
In this task, 6th graders must inches to feet in order to find the area of a rectangular board and explain the error in the calculations made by the board owner. Aligns with 6.RP.A.3.
Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: 6.g Painting a Barn

For Teachers 6th Standards
This task asks students to determine the area of the exterior walls of a barn and to calculate how many gallons of paint would be needed to cover them, as well as the cost of the paint. Aligns with 6.G.A and 6.RP.A.3.
Whiteboard
ClassFlow

Class Flow: Area Perimeter

For Teachers 3rd - 8th Standards
[Free Registration/Login Required] This flipchart demonstrates how to calculate perimeters and areas of simple compound shapes that can be split into rectangles.
Unknown Type
Math Drills

Math Drills: Measurement Worksheets

For Students 9th - 10th Standards
Download these free worksheets to sharpen your measurement skills. Sheets focus on temperature, conversion, area and perimeter, volume, and more.
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.
Lesson Plan
Alabama Learning Exchange

Alex: Swimming Pool Math

For Teachers 9th - 10th Standards
Students will use a swimming pool example to practice finding perimeter and area of different rectangles.
Lesson Plan
PBS

Pbs Learning Media: Math + Arts: Dance Space

For Students K - 1st
In this lesson, students students explore locomotor and non-locomotor movement and calculate the area needed to perform the African-American dance Zudio.
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.
Activity
Texas Instruments

Texas Instruments: Building a Better Pet Run

For Teachers 9th - 10th
This activity is designed to make students realize that area of a rectangle changes for different widths.
Lesson Plan
Other

Nearpod: Geometry: Fall Edition

For Teachers 3rd
For this lesson, 3rd graders will use multiplication to find the area of a rectangle.
Handout
Math Open Reference

Math Open Reference: Quadrilaterals

For Students 9th - 10th Standards
A complete reference guide to quadrilaterals including squares, rectangles, parallelograms, trapezoids, and rhombus. It provides definitions and interactive activities that enhance further explanation.
Unit Plan
BBC

Bbc: Bitesize: Maths: 2 D Shapes

For Students 2nd - 8th Standards
Learn about the properties of 2-D shapes: circles, triangles, polygons, and quadrilaterals. Includes information, video, and examples about each, with games and quizzes for reinforcement.
Interactive
Calculator Soup

Calculator Soup: Parallelogram Calculator

For Students 9th - 10th Standards
Calculate certain variables of a parallelogram depending on the inputs provided. Calculations include side lengths, corner angles, diagonals, height, perimeter, and area of parallelograms.
Whiteboard
ClassFlow

Class Flow: Geoboards

For Teachers 9th - 10th Standards
[Free Registration/Login Required] Geoboards bring challenge into the classroom as the student uses methods to measure length, area, and perimeters of polygons.
Lesson Plan
Alabama Learning Exchange

Alex: 'There's Gold in Them There Hills'

For Teachers 6th - 8th
Learners study the important characteristics of quadratic relationships by exploring the area of rectangles with a fixed perimeter. This instructional activity involves tables, graphing and patterns. This Lesson is adapted from a...

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