Activity
Texas Instruments

Texas Instruments: The Area of the Trapeziod

For Teachers 9th - 10th
This activity is a based on an activity I saw in Exploring Geometry with the Geometer's Sketchpad. Student will construct a trapeziod and then use rotation to create a parallelogram from the trapeziod. The follow up questions lead the...
Interactive
National Council of Teachers of Mathematics

Nctm: Illuminations: Igd: Area of a Parallelogram

For Students 3rd - 8th Standards
Use this interactive tool to learn how to find the area of a parallelogram. Click on "Instructions" for details on how to use this tool. Click on "Explore" for more ideas.
Activity
George Mason University

Area Formula Lab

For Teachers 4th - 8th Standards
In this set of worksheet activities, students will be guided to discover formulas for area of polygonal shapes and circles.
Unit Plan
Khan Academy

Khan Academy: Area of Parallelograms

For Students 5th - 7th Standards
Practice finding the area of parallelograms given base and height. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Activity
National Council of Teachers of Mathematics

Nctm: Illuminations: Igd: Area of a Parallelogram

For Students 3rd - 8th Standards
This applet will show you how to divide the parallelogram into pieces, arrange them together to form a rectangle, and then use the formula for the area of a rectangle to find the area of the parallelogram.
Lesson Plan
Better Lesson

Better Lesson: Finding the Area of a Parallelogram

For Teachers 6th Standards
Sixth graders find the area of parallelograms by using square units and the area formula.
Handout
Quia

Ixl Learning: Area of Parallelograms

For Students 6th - 7th Standards
Brush up on your math skills relating to the area of parallelograms then try some practice problems to test your understanding.
Handout
Quia

Ixl Learning: Parallelograms

For Students 3rd - 5th Standards
Brush up on your math skills pertaining to parallelograms then try some practice problems to test your understanding.
eBook
Math Planet

Math Planet: Geometry: Parallelogram, Triangles Etc

For Students 9th - 10th Standards
Resource examines the area of geometric solids through examples and a video lesson. [0:39]
Interactive
National Council of Teachers of Mathematics

Nctm: Illuminations: Area of Triangles

For Students 3rd - 8th Standards
To find the area of a triangle, try to make a parallelogram using a copy of the triangle.
Unit Plan
1
1
Khan Academy

Khan Academy: Area Challenge

For Students 5th - 7th Standards
Practice solving problems involving triangles, parallelograms, and composite figures. Exercises include decimals, fractions, and word problems. Area of circles is not included. Students receive immediate feedback and have the opportunity...
Handout
Quia

Ixl Learning: Area of Trapezoids

For Students 6th - 7th Standards
Brush up on your math skills relating to the area of trapezoids then try some practice problems to test your understanding.
Activity
Ministry of Education and Universities of the Region of Murcia (Spain)

Ministerio De Educacion Y Ciencia: Figuras Geometricas en El Plano

For Students 9th - 10th Standards
Interactive activities dealing with the areas of quadrilaterals figures.
Handout
Varsity Tutors

Varsity Tutors: Hotmath: Algebra Review: Parallelogram

For Students 9th - 10th Standards
Find a quick, concise explanation of a parallelogram. An example is given and clearly explained.
Unit Plan
Varsity Tutors

Varsity Tutors: Hotmath: Review: Area

For Students 9th - 10th Standards
Find a quick, concise explanation of area and the formulas for different shapes. An example is given to help you understand how find the area of a shape. The area formulas are listed for different types of shapes.
Unit Plan
Oswego City School District

Regents Exam Prep Center: Area of a Triangle and Parallelogram Using Trig

For Students 9th - 10th Standards
How can trigonometry be used to find the area of a triangle or parallelogram? Does the triangle need to be a right triangle, and how accurate can the results possibly be? The answers to these questions are found here along with several...
Handout
Math Open Reference

Math Open Reference: Area of a Parallelogram

For Students 9th - 10th
Learn about the area of a parallelogram with this helpful reference tool. Provides a detailed definition, examples, and an interactive activity that enhances further explanation. Includes links to related topics.
Handout
Math Open Reference

Math Open Reference: Perimeter of a Parallelogram

For Students 9th - 10th
Learn about the perimeter of a parallelogram with this helpful reference tool. Provides a detailed definition, examples, and an interactive activity that enhances further explanation. Includes links to related topics.
Lesson Plan
Homeschool Math

Homeschool Math: Area of Triangles

For Students 4th - 6th Standards
This lesson presents the idea that the area of any triangle is exactly half of a certain parallelogram -- thus we get the familiar formula of multiplying the base and the altitude and taking half of that. The lesson contains varied...
Activity
Texas Instruments

Texas Instruments: Perimeters, Areas, and Slopes Oh, My!

For Teachers 9th - 10th Standards
In this activity, students create geometric figures, and use analytic and coordinate geometry to investigate their attributes. They go through the process of proving that a quadrilateral is a parallelogram.
Handout
Math Open Reference

Math Open Reference: Area of a Rhombus

For Students 9th - 10th
Learn about the area of a rhombus with this handy reference guide. Provides a detailed definition, formulas, and an interactive activity that enhances further explanation. Includes links to related topics.
Whiteboard
ClassFlow

Class Flow: Perimeter & Area of Rectangles & Parallelograms

For Teachers 6th - 8th Standards
[Free Registration/Login Required] In this flipchart, students will investigate the area and perimeter of rectangles and parallelograms. This is an interactive lesson and also includes an assessment.
Whiteboard
ClassFlow

Class Flow: Area

For Teachers 9th - 10th Standards
[Free Registration/Login Required] This creative and engaging flipchart explains the area of all kinds of shapes, to include squares, parallelograms, rectangles, triangle, and trapezoids.
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...

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