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Lesson Plan
Curated OER

Finding the Circumference and Area of a Circle

For Teachers 6th
Sixth graders discover what circumference is.  In this measurement lesson, 6th graders identify the radius and diameter of different circles. Students discover how to find the area of a circle using the radius and diameter.
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Lesson Plan
Curated OER

The Geometry of Circles

For Teachers 6th - 12th
Students review the parts of a circle, calculate the circumference and area of a circle, and create student-made tests on the geometry of circles using educational software.
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Lesson Plan
Curated OER

ExplorA-Pond: 6th Grade Area and Random Number Tables

For Teachers 6th
Sixth graders estimate surface area of a pond using a random number table.
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Worksheet
Curated OER

Circles: Circumference and Area

For Students 8th - 11th
In this circle worksheet, students calculate the circumference and area of given circles. They determine the perimeter of a shaded area, and give explanations to support problems. This two-page worksheet contains 3 multi-step problems.
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Lesson Plan
Teach Engineering

Discovering Relationships Between Side Length and Area

For Students 9th - 12th Standards
Consider the relationship between side length and area as an input-output function. Scholars create input-output tables for the area of squares to determine an equation in the first installment of a three-part unit. Ditto for the area of...
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Lesson Plan
Curated OER

Looking at Circumference

For Teachers 6th - 8th
Young scholars understand where the number for pi comes from. They understand and use the formula for circumference. Students measure the circles given out and the diameters of those circles and record the results on their worksheet.
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Worksheet
Curated OER

Coordinate Grid: Area and Circumference of Circles

For Students 9th - 12th
Here is a geometry worksheet 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

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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Instructional Video21:05
2
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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Lesson Plan
Curated OER

Geometry: Area, Scale Factor, Circumference

For Teachers 5th - 8th
For 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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Lesson Plan
Curated OER

Area of Circles and Probability

For Teachers 8th - 12th
Students investigate the area of squares and circles. For this geometry lesson, students calculate the area and probability of simple events. They work on a laptop using Safari.
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Activity
101 Questions

Penny Circle

For Teachers 7th - 12th Standards
Watch as your classes buy into a rich lesson full of information. A video opener challenges individuals to determine the number of pennies that fit in a circle with a 22-inch diameter. Using lesson materials, scholars collect data and...
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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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Activity
101 Questions

Best Circle

For Teachers 9th - 12th Standards
Drawing the perfect circle is harder than one would think! What makes a circle a circle and how can you define that with a formula? Young mathematicians devise their own methods of analyzing the imperfections of circle drawings. Using...
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Organizer
Curated OER

Calculate the Area

For Students 6th
In this area of a circle worksheet, 6th graders must calculate the area of 5 circles given either the radius or diameter. Students must write the area on the line provided and a blank space is provided for students to work out the...
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Worksheet
Curated OER

Circumference and Area

For Students 6th
In this circumference and area worksheet, 6th graders find the circumference and area of circles when the diameter is given. Students complete 9 problems.
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Lesson Plan
Curated OER

Radius, Diameter and Circumference

For Teachers 8th - 10th
In this circle worksheet, students use a drawing of a circle. The diameter is given. Students find the radius, circumference and area of the circle. On the second problem, students are shown a circle with a hole inside it. They compute...
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Interactive
Curated OER

Circles

For Students 10th
In this geometry instructional activity, 10th graders determine the circumference and area of a circle given either the diameter or the radius. The one page interactive instructional activity contains ten questions. Answers and hints are...
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Worksheet
Curated OER

Circumference and Area

For Students 4th - 6th
In this circumference and area worksheet, students find each for a set of 9 circles. A website reference for additional activities is given.
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Assessment
1
1
Balanced Assessment

Star from Square

For Students 9th - 12th Standards
Quilting is not only beautiful and unique—it is a mathematical art. Show your classes how to design a quilting block while practicing area and circumference of circles. Scholars create a star from a square and then find the circumference...
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Lesson Plan
Virginia Department of Education

Arc Length and Area of a Sector

For Teachers 9th - 11th Standards
What do skateboarding and baked goods have in common with math? You can use them to connect half-pipe ramps and cakes to arcs and sectors. Pupils compare the lengths of three different ramp options of a skate park. They calculate the...
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Lesson Plan
Curated OER

Bubble Mania

For Teachers K - 5th
Elementary schoolers practice measuring a soap bubble print. They follow a recipe to make a soap bubble solution. Pupils use the soapy solution to blow large bubbles with a plastic drinking straw until they pop leaving behind a circular...
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Lesson Plan
Virginia Department of Education

Surface Area and Volume of a Cylinder

For Teachers 7th Standards
Surface area or volume? Pupils first review the difference between surface area and volume. They then use a two-dimensional net that helps them develop formulas for the surface area and volume of cylinders.
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Worksheet
Curated OER

Circumference and Area

For Students 10th
In this circumference and area worksheet, 10th graders solve nine problems relating to geometric shapes. They find the circumference of a circle and the perimeter of a triangle and a six-sided figure. Students also find the area of a...

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