Curated OER
Circle Relationships
Students explore circles.  In this geometry instructional activity, students explore the relationship between the circumference of a circle, the distance a ball travels, and the number of rotations the ball must make in order to...
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Perimeter and Circumference
Learners consider perimeter and circumference. In this lesson plan on perimeter, students will determine relationships between perimeter and circumference using real life examples.
Alabama Learning Exchange
It's Around There Somewhere! Perimeter, and Circumference
Explore the concept of building equations for perimeter and circumference. Learners use rulers to measure the perimeter of half a sheet of paper.  Then fold the sheet of paper numerous times, each time measuring perimeter. ...
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Circumference and Area
In this circumference and area learning exercise, 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...
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Circles And Cylinders
Students investigate some of the mathematical concepts involved in the study of circles. They first practice finding the circumference of a circle by finding the diameter and performing the calculation. The lesson delivery is done using...
Curated OER
Circles: Circumference and Area
For 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.
Curated OER
Equations of Circles
Students will define circle and radius. In this radius lesson,  students are given a circumference, they will write an equation and sketch the circle. Students will match graphs of circles to their equations. 
 
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Ara of Circles
Students identify the differentiate the different properties of circles and parallelograms. In this geometry instructional activity, students calculate the area of each solid and identify the formula. They relate Pi to the circumference...
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Perimeter and Circumference
In this perimeter and circumference worksheet, students observe diagrams and determine their perimeter or circumference.  Diagrams include triangles, circles, parallelograms, rectangles, and composite figures.  This one-page worksheet...
Curated OER
All About Circles
In this all about circles instructional activity, students interactively answer 10 multiple choice questions about circles, then click to check their answers.
Curated OER
Geometry of Circles: Week 7
In this circle worksheet, students determine the number of degrees in a minor arc, find the area of a circle, find the area of a shaded region.  This two-page worksheet contains six problems.
Curated OER
Crop Circles
Students calculate the area and circumference of a circle. In this geometry instructional activity, students solve word problems with circles and create formulas to calculate the area. They find the rate and complex area of a circle.
Curated OER
Perimeter, Circumference, Volume, and Surface Area
In this Perimeter, Circumference, Volume, and Surface Area worksheet, students are asked to identify geometric formulas and calculate for volume and surface area for geometric solids.  In addition, students are asked to identify...
Curated OER
Circumference of a Pumpkin
Fourth graders watch a video and find the circumference of a pumpkin. In this circumference instructional activity, 4th graders watch a video to help them find the circumference of their pumpkins. Students define the word circumference...
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Arcs in Circles
In this arcs in circles activity, 10th graders identify 10 different circles and the measurement of their arcs. First, they determine the length of a minor arc to the nearest integer. Then, students determine the radius of a circle...
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Circles
In this circles worksheet, 10th graders solve 10 different problems that include determining various types of circles. They write the standard form of the equation of the circle with the given radius and center. Then, students solve each...
Curated OER
Algebra/Geometry Institute: Area, Circumference, Perimeter
Students solve area problems.  In this area, circumference, and perimeter lesson, students solve area and perimeter problems using standard and metric units of measure.  They identify the best customary unit of measure for a...
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Discovering Pi
Sixth graders measure circumference and diameter to the nearest eighth of an inch, record measurements on a spreadsheet, and use the internet to complete a "scavenger hunt" of facts concerning pi.
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Small Angle Calculations
Students work with circles, angles and estimating angles in the night sky. In this circles and angles lesson, students practice measuring a degree using the circumference of a circle and apply the degree to determine a way to use their...
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A Slice of Pi
Math pupils, by viewing a video, discover the history of pi and some of the applications of its uses in the world today. They conduct an experiment by measuring the diameter and circumference of various circular objects to calculate...
Curated OER
Discovering PI
In this pi worksheet, students identify and complete 4 different problems that include pi and graphing data points. First, they complete the chart at the top by measuring the diameter and circumference of each object. Then, students plot...
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One Revolution for Robot
Students calculate the revolution and circumference of circles. In this calculus lesson, students derive the formulas for their given shape. They use the d=rt to calculate the distance and rate of travel.
Curated OER
Cap-It to the Max
Eighth graders compare the volume of three cylinders constructed from the same size sheet of paper. They use concrete and graphical models to derive formulas for finding perimeter, circumference, area, and volume of two and three...
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Sir Cumference and the First Round Table
In this circumference worksheet, students solve and complete 5 different figures illustrated on the sheet. First, they cut out each shape found on the bottom. Then, students use the shapes on the left as clues to create the corresponding...
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