Texas Instruments
Texas Instruments: Approximation of Pi Using an Area Model
Students will approximate pi by setting up trigonometric ratios and calculating the areas of regular polygons inscribed within and circumscribed about a circle.
Shodor Education Foundation
Shodor Interactivate: Lesson: Area
This lesson plan helps students explore the mathematical concept of area and features resource links to further learning. CCSS.Math.Content.3.MD.C.7.a Find the area of a rectangle with whole-number side lengths by tiling it
CK-12 Foundation
Ck 12: Geometry: Area and Perimeter of Triangles
[Free Registration/Login may be required to access all resource tools.] In this lesson students use formulas and given information to figure out the dimensions and the area of different triangles. Students examine guided notes, review...
Oswego City School District
Regents Exam Prep Center: Area of Polygons and Circles
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,...
Texas Instruments
Texas Instruments: Polygon Area
Students will compare areas of different polygons with a fixed perimeter and find the shape that gives the maximum area
Texas Instruments
Texas Instruments: Area and Perimeter of Regular Polygons
Students determine the area and perimeter of regular polygons and use that information to conduct a beginning investigation of limits.
Texas Instruments
Texas Instruments: Finding the Area of a Perfect Polygon.
Students will review how to find the area of a regular polygon.
National Council of Teachers of Mathematics
The Math Forum: Seventh Grade Math: Area and Perimeter
Learn how to enlarge drawings, figure out how much tile to buy to cover a specific floor, and learn about area and perimeter. These and other lesson plans are provided, including a fun interdisciplinary plan featuring dragons.
National Council of Teachers of Mathematics
The Math Forum: Find the Area of the Shape!
Try to figure out the area of this challenging shape. In order to view the images, you will need to use JavaSketchpad.
Varsity Tutors
Varsity Tutors: Hotmath: Practice Problems: Polygons and Areas of Plane Figures
Twenty-five problems cover the topics of polygons and finding the area for various plane figures. They are given with each step to the solution cleverly revealed one at a time. You can work each step of the problem then click the "View...
Cut the Knot
Cut the Knot!: Polygons: Formality and Intuition
This is a very interesting site about polygons. The site begins by distinguishing between shapes whose sides intersect and polygons whose sides do not overlap. After this short introduction, you will find information regarding area and...
OER Commons
Oer Commons: Area of a Circle
Seventh graders will compare the formula for the area of a regular polygon to discover the formula for the area of a circle.
Math Is Fun
Math Is Fun: Area of Irregular Polygons
Learn how to use coordinates to calculate the area of an irregular polygon.
Khan Academy
Khan Academy: Area of Triangles
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.
Texas Education Agency
Texas Gateway: Determining the Perimeter of a Polygon (Series and Activity 1)
This activity provides an opportunity for students to investigate the perimeter of polygons.
CK-12 Foundation
Ck 12: Elem Math: Given the Perimeter Find the Side Length and Area Squares
[Free Registration/Login may be required to access all resource tools.] Students watch a video overview on how to find the area of a square when given the perimeter. CCSS.Math.Content.3.MD.D.8 Solve real world and mathematical problems...
Khan Academy
Khan Academy: Area and Perimeter on the Coordinate Plane
Find the area or perimeter of shapes like triangles, rectangles, parallelograms, and hexagons on the coordinate plane. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
CK-12 Foundation
Ck 12: Elem Math: Given the Area Find the Side Length and Perimeter Squares
[Free Registration/Login may be required to access all resource tools.] Students watch a video and attempt practice problems on how to find the perimeter and side length of a square when given the area of a square....
Better Lesson
Better Lesson: Finding Arrays in an Irregular Polygon
Third graders decompose an irregular polygon into arrays to find the area.
Other
Gobierno De Navarra: Areas De Poligonos
Interactive figures to figure out how to calculate the areas of polygons.
Math Cats
Math Cats: Go to the Polygon Playground
In this interactive activity you can click and drag on hundreds of different polygons to paste in your screen and create your own patterns and forms.
CK-12 Foundation
Ck 12: Geometry: Perimeter and Area Study Guide
[Free Registration/Login may be required to access all resource tools.] This study guide looks at the definitions and units for perimeter, area, and circumference, and at the perimeter and area of different shapes, including regular...
CK-12 Foundation
Ck 12: Geometry: Area and Perimeter of Rectangles
[Free Registration/Login may be required to access all resource tools.] In this lesson, students find the perimeter and area of squares and rectangles by using formulas. Students examine guided notes, review guided practice, watch...
CK-12 Foundation
Ck 12: Elem Math: Area in Grid
[Free Registration/Login may be required to access all resource tools.] Students watch a video overview and attempt practice problems on how to find the area of a shape using grids.
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