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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.
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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.
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Lesson Plan
Better Lesson

Better Lesson: Area of Irregular Polygon

For Teachers 3rd Standards
Third graders look for break apart irregular polygons to make arrays to find the area of these common shapes.
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Lesson Plan
Better Lesson

Better Lesson: Area in Real Life With Irregular Polygons

For Teachers 3rd Standards
Dividing an irregular shape into rectangles helps students find the area of an irregular shape.
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Unit Plan
Khan Academy

Khan Academy: Area of Composite Shapes

For Students 5th - 7th Standards
Practice finding the areas of complex shapes that are composed of smaller shapes. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
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Unit Plan
Khan Academy

Khan Academy: Area of Triangles

For Students 5th - 7th Standards
Practice finding the area of right, acute, and obtuse triangles. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
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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...
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Unit Plan
CK-12 Foundation

Ck 12: Geometry: Area of Squares and Rectangles

For Students 6th - 8th
[Free Registration/Login may be required to access all resource tools.] In this lesson students find the area of squares and rectangles. Students examine guided notes, review guided practice, watch instructional videos and attempt...
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Unit Plan
CK-12 Foundation

Ck 12: Geometry: Area and Perimeter of Rhombuses and Kites

For Students 9th - 10th
[Free Registration/Login may be required to access all resource tools.] This concept teaches students to calculate the area and perimeter of rhombuses and kites. Students examine guided notes, review guided practice, watch instructional...
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Unit Plan
CK-12 Foundation

Ck 12: Geometry: Area of Composite Shapes

For Students 9th - 10th Standards
[Free Registration/Login may be required to access all resource tools.] This concept teaches students how to calculate the area of composite shapes. Students examine guided notes, review guided practice, watch instructional videos and...
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Unit Plan
CK-12 Foundation

Ck 12: Geometry: Area and Perimeter of Rhombuses and Kites

For Students 9th - 10th Standards
[Free Registration/Login may be required to access all resource tools.] In this lesson students calculate the area and perimeter of a rhombus or kite. Students examine guided notes, review guided practice, watch instructional videos and...
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Unit Plan
Mr. Martini's Classroom

Mr. Martini's Classroom: Area of Triangles, Trapezoids & Parallelograms

For Students 3rd - 8th Standards
Students solve for the area of rectangles, squares, triangles, trapezoids, and parallelograms.
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Article
Mocomi & Anibrain Digital Technologies

Mocomi: What Is a Polygon?

For Students 2nd - 8th
Defines polygons and explores characteristics, types of polygons, and how to calculate the area of a polygon.
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Unit Plan
Shmoop University

Shmoop: Basic Geometry: Area (Polygon, Triangle, Circle, Square)

For Students 9th - 10th Standards
The geometry resource investigates the area of polygons, triangles, circles, and squares. Formulas and examples are included.
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Unit Plan
Shmoop University

Shmoop: Basic Geometry: Area Formulas

For Students 9th - 10th Standards
The geometry resource investigates the area of polygons, triangles, circles, and squares. Formulas, examples, and practice exercises are included.
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Activity
Texas Instruments

Texas Instruments: Approximation of Pi Using an Area Model

For Teachers 9th - 10th Standards
Students will approximate pi by setting up trigonometric ratios and calculating the areas of regular polygons inscribed within and circumscribed about a circle.
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Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: 8.g Areas of Geometric Shapes With the Same Perimeter

For Teachers 8th Standards
Eighth graders are shown three polygons with equal sides and a circle. They are asked to find the area of each when the perimeter is one unit and to order them from smallest area to largest. Aligns with 8.G.B.7.
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Activity
Texas Instruments

Texas Instruments: Circles: Circumference and Area

For Teachers 9th - 10th Standards
The idea of perimeter can be applied not only to polygons but to circles as well. The same idea can be said for the area of a circle. (Continued. See "before the activity.") [Requires Adobe Reader.]
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Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: 8.g Area of a Trapezoid

For Teachers 8th Standards
Eighth graders are given various dimensions of a trapezoid and are asked to find its area. This requires them to use the Pythagorean Theorem and to decompose the trapezoid into other polygons. Aligns with 8.G.B.7.
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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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Whiteboard
ClassFlow

Class Flow: Area

For Teachers 3rd - 5th
[Free Registration/Login Required] This flipchart teaches students how to find the area of an irregular polygon.
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Whiteboard
ClassFlow

Class Flow: Area of Polygons

For Teachers 6th - 8th Standards
[Free Registration/Login Required] This flipchart provides students with notes and practice with using formulas for finding the area of triangles and quadrilaterals.
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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.
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Activity
Analyze Math

Analyze Math: Polygons Problems

For Students 9th - 10th Standards
Here are four problems about the area of a regular polygon. Start by finding the area of a hexagon inscribed in a circle of radius 10, and end by proving that as the number of sides of the polygon increases, the area of the polygon...

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