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Lesson Plan
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NASA

It All Comes Full Circle

For Teachers 9th - 12th Standards
How long does it take spacecraft go around the earth? Using the circular orbits of the space shuttle and the International Space Station, groups determine the distance traveled in one revolution, then calculate the distance traveled...
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Worksheet
Curated OER

Circle Area, Perimeter and Circumference

For Students 7th - 9th
Use this geometry skills practice activity to have learners solve seven problems that require them calculate the circle area, perimeter, and circumference of circles.
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Instructional Video21:05
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2
Flipped Math

Circles and Arc Lengths

For Students 9th - 12th Standards
Discuss all things round and round. Pupils review finding area and the circumference of circles and use them to solve problems. Next, they learn about central angles and their relationships to measures of arcs. Learners then find out how...
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Worksheet
Curated OER

Circle Formulas

For Students 10th
Tenth graders apply various circle formulas to determine radii, diameter, circumference, area, arc length, and sector area. The two page worksheet contains twenty-five problems. Answers are not provided. 
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Worksheet
Curated OER

Coordinate Grid: Area and Circumference of Circles

For Students 9th - 12th
Here is a geometry activity in which learners plot the points of a circle onto a coordinate grid and proceed to calculate the area or circumference of the circle. There are four questions.
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Worksheet
Curated OER

Circles and Cylinders

For Students 10th
In this geometry lesson, 10th graders break down a circle and identify the different parts. They discuss chords, diameter, radius, circumference, major and minor segment. There are 42 problems broken down into 5 different sections.
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Worksheet
Curated OER

Circles: Geometry Review Worksheet

For Students 10th Standards
Tenth graders solve and complete 14 different geometry problems. First, they find the area and circumference of a circle with a given radius. Then, they find the area between a circle and an inscribed equilateral triangle given the...
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Worksheet
Curated OER

Similar Triangles and Trapezoids, and Circles

For Students 9th - 12th
High schoolers answer two problems involving area of shaded regions. Students then answers six questions involving perimeter, area, and circumferences. The remaining two questions involve ratios of similar figures.
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Activity
Noyce Foundation

Circular Reasoning

For Students K - 12th Standards
Examine the origin and application of pi in five different levels. The five lessons in the resource begin with an analysis of the relationship between the radius and circumference of a circle. The following lessons lead learners through...
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Worksheet
Curated OER

Area of a Circle When Radius is Given

For Students 5th - 8th
Five problems provide practice for learners to find the area of a circle given the distance of the radius. Answers on the key use pi as a variable and do not include fully computed numeric answers. To reinforce basic multiplication facts...
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Worksheet
Curated OER

Area of Circle Worksheet

For Students 6th - 10th
Given the diameter of a circle, learners are charged with finding its area. They halve the diameter, square it, and multiply by pi. Five problems provide basic practice. 
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Assessment8:43
Mathed Up!

Area and Circumference of Circles

For Students 8th - 10th Standards
Don't go around and around, help your class determine amounts around and in a circle with a video that connects circumference to the perimeter or the distance around an object. The resource includes 14 questions dealing with circles and...
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Assessment
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Balanced Assessment

Square and Circle

For Students 9th - 12th Standards
To determine the dimensional change to quadruple the area, class members determine how to increase the dimensions of a square and a circle to increase the perimeter by a given factor. they then calculate the necessary factor to create...
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Instructional Video3:29
PBS

Scale City — Scaling up Recipes and Circles in the Real World

For Students 6th - 7th Standards
What a great big skillet you have. The resource introduces the class to the world's largest stainless steel skillet. The class creates a model of the skillet and a typical 12-inch skillet and compares the relative sizes of their areas....
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Worksheet
Mrs. Glosser's Math Goodies

Circumference & Area Worksheet 1

For Students 6th - 9th Standards
Don't stress about creating your own problems and use this series of circumference and area worksheets. The problems ask pupil to plug diameter and radius into the formula to solve for area or circumference. The problems also have...
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Worksheet
Mrs. Glosser's Math Goodies

Circumference & Area Worksheet 2

For Students 6th - 9th Standards
With plenty of problems to chose from, this series of worksheets provides you different types of area and circumference problems. Your learners can plug diameter and radius in to solve, or they can work backward when the area or...
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Worksheet
Mrs. Glosser's Math Goodies

Circumference & Area Worksheet 3

For Students 6th - 9th Standards
You can't go wrong with this series of practice problems about circumference and area. The answer keys are provided, so you can use some or all of the problems without needing to worry about solving beforehand. Some problems have your...
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Worksheet
Curated OER

Circumference and Area of Circles (A)

For Students 5th - 6th
In this geometry instructional activity, students solve 12 problems in which the area and circumference of a circle is calculated to the tenth place. No formulas are given on this page.
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Worksheet
Curated OER

Circumference and Area of Circles (B)

For Students 5th - 6th
In this geometry worksheet, students calculate the area and circumference of 12 circles in which either the diameter or radius is shown. There are no formulas given on this page.
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Worksheet
Curated OER

Circumference and Area of Circles

For Students 5th - 6th
In this circumference and area worksheet, students find each for a set of 12 given circles; either diameter or radius are given. A website reference for additional resources and answers are provided.
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Lesson Plan
Curated OER

Geometry: Area, Scale Factor, Circumference

For Teachers 5th - 8th
In this geometry worksheet, students solve 10 problems regarding area, scale factors, and circumference. Students, in 3 of the problems, are given the circumference and asked to work backwards to find missing information.
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Worksheet
Curated OER

Circles

For Students 7th
In this circles worksheet, 7th graders identify and complete 6 different problems that include determining various parts of a circle. First, they identify and define each circle term listed on the left. Then, students color each term...
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Worksheet
Curated OER

Calculate the Circumference

For Students 7th
In this calculate the circumference worksheet, 7th graders find the circumference given the diameter of 4 circles; the formula and the answers are provided.
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Worksheet
Curated OER

Circles: Finding Circumference

For Students 9th - 12th
In this circles worksheet, students find the circumference of 20 circles.  Students find the circumference given the radius, diameter, and area of various circles.

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