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Lesson Plan
Curated OER

Parachutes, Circles and Pi...Oh My!

For Teachers 6th - 7th
Learners explore different size circles to discover the relationship between diameter and circumference. In this circles and Pi lesson, students construct simple parachutes using circle patterns of varying sizes. Learners predict the...
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Lesson Plan
Curated OER

Explora-Pond: Surface Area

For Teachers 4th - 6th
Learners estimate the surface area of a pond using ratios and chance methods of estimation. They gain insight into how well estimations based on chance outcomes match the average of a maximum area estimation and a minimum area estimation.
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Lesson Plan
Curated OER

Area and Perimeter of Regular Polygons - An Extension

For Teachers 9th - 12th Standards
Pupils explore the relationship between area and perimeter of polygons.They measure the area and perimeter of regular polygons inscribed in a circle. Learners then discuss how as the number of sides of a regular polygon increase, the...
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Worksheet
Curated OER

Area of 2D Shapes Homework

For Students 9th - 12th
In this geometry worksheet, students solve the area of 2D shapes starting with squares, rectangles, parallelograms, triangles, rhombi, trapezoids, circles, and ending with area of shaded regions. There are 20 questions.
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Interactive
Curated OER

Area of 2D Shapes Multiple Choice

For Students 7th - 10th
In this area worksheet, students compute the area of circles, parallelograms and rectangles.  This one-page worksheet contains 5 multiple-choice problems.  Answers are provided in this online worksheet.
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Worksheet
Curated OER

Circles and Squares

For Students 9th - 12th
In this area worksheet, students find the ratio of 1 area problem.  Students find the ratio of areas of inscribed circles to circumscribed squares.
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Lesson Plan
Curated OER

Comparing Area and Perimeter

For Teachers 9th - 11th
Students solve problems by finding the perimeter and area of an enclosed area. In this geometry lesson, students differentiate between the area and the perimeter. They see how they relate and how to use it to maximize an enclosed area.
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Worksheet
Math eBook

Circumference of a Circle

For Students 6th - 9th Standards
Save trees and practice calculating the circumference of circles with this online interactive task! Of course, if you want individuals to turn it in, you will still need to print copies. There are 20 problems to solve, all of which...
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Worksheet
Curated OER

Volume and Surface Area of Polyhedrea

For Students 8th - 11th
In this volume and surface area learning exercise, students use given formulas to determine the volume and area of polyhedrea. This four-page learning exercise contains examples, explanations and 32 problems. Answers are provided on...
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Lesson Plan
Curated OER

Area and Perimeter of Polygons

For Teachers 10th
In this geometry worksheet, 10th graders calculate the perimeter and area using the specific formula for that polygon. There are 5 questions with an answer key.
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Lesson Plan
Curated OER

Perpendicular Segments in a Circle

For Teachers 9th - 12th Standards
High schoolers explore the concept of circles as they construct a circle using a program such as Cabri Jr. Learners construct a chord and a diameter that are perpendicular, then measure the bisected chord and notice that both sides of...
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Interactive
Curated OER

Yoplait with Areas and Volumes

For Students 9th - 12th
In this areas and volumes worksheet, high schoolers find the area of truncated cones and elliptical cylinders.  They find the area by using one of three methods:  the disk method, the shell method, and using geometry.  This one-page...
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Lesson Plan
Curated OER

Circumscribing a Circle About a Triangle

For Teachers 9th - 12th Standards
Pupils circumscribe a circle about a triangle. They construct a triangle using Cabri Jr and then circumscribe it. They then use knowledge of perpendicular bisectors and circumcenters to locate the center of the circle and then...
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Worksheet
Curated OER

Find the Area

For Students 10th
In this find the area worksheet, 10th graders solve and complete 18 different types of problems. First, they find the area of a figure with consecutive sides. Then, students find the area and perimeter of a square shown. They also find...
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Worksheet
Curated OER

Arc Length and Sector Area

For Students 10th - 12th
In this arc length worksheet, students find the designated arc length of various circles. They determine the area of each sector. This four-page worksheet contains 24 problems. Answers are provided on the last two pages.
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Worksheet
Curated OER

Perimeter and Area

For Students 7th - 10th
In this perimeter and area worksheet, students find the surface area of given polygons.  They determine the area of shaded regions.  This one-page worksheet contains 10 multiple-choice problems.  Answers are provided.
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Worksheet
Curated OER

Guided Notes on Area

For Students 9th - 10th
In this area instructional activity, students find the area of rectangles, triangles and circles. This eight-page instructional activity contains approximately 36 problems. Examples and explanations are provided. Answers are included at...
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Lesson Plan
Curated OER

Volume and Surface Area of Right Rectangular Prisms

For Teachers 6th - 8th
Learners identify the formulas for three-dimensional figures. They use manipulatives to model problems. Students create foldables and explain volume and surface area. Learners complete worksheets and classify solids. Students sing a...
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Worksheet
Curated OER

Perimeter and Area

For Students 9th
In this perimeter and area instructional activity, 9th graders solve 17 various types of problems, mostly word problems related to determining the area or perimeter of a geometric shape. They also determine the area and perimeter of...
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Lesson Plan
Curated OER

Equations of Circles

For Teachers 9th - 12th Standards
Using Cabri Jr. high schoolers construct a circle and determine the equation of the circle they drew by finding the center and the radius. Students use the distance formula to derive the equation of their circle.
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Lesson Plan
Curated OER

Construction Circles

For Teachers 9th - 12th Standards
Pupils investigate the number of points needed to determine a unique circle in a plane. Using Cabri Jr., they apply construction techniques to generate a circle that passes through a given number of points.
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Worksheet
Curated OER

Algebra II - Lesson 10-3: Circles

For Students 9th - 12th
In this equations of circles instructional activity, high schoolers solve 4 short answer problems. Students find an equation of a circle given the center and radius.
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Worksheet
Curated OER

Area and Perimeter of Compound Shapes

For Students 7th - 9th
In this geometry activity, students find the area and perimeter of 6 different compound shapes containing squares, rectangles, triangles, and half circles. 
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Worksheet
Curated OER

Volume and Surface Area

For Students 10th
For this volume and surface area worksheet, 10th graders solve and complete 10 different problems that include using spheres to examine changes in volume and surface area. First, they complete the chart shown using the formulas given....

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