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\nLesson Planet Curated\n
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\nKnow and Use the Formulas for Area and Circumference of a Circle (7.G.B.4)\n

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\n\nFor Teachers\n\n6th - 8th\n\nStandards\n
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\nPractice with the formulas for circumference and area of a circle. Videos each work with a specific area and the last video challenges them to work backwards when given the area.\n
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Instructional Video4:02
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\n\"Area\n\n
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\nKhan Academy\n
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\nArea of a Circle, Perimeter, Area, and Volume, Geometry\n

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\n\nFor Students\n\n7th - 10th\n
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\nThis production, the second installment in a series of circles, demonstrates the process of finding the area of a circle. It is effective as an introductory tool. However, it needs to explain the reasoning behind the formula because that...\n
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Lesson Plan
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\n\"Measuring\n\n
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\nCurated OER\n
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\nMeasuring the Area of a Circle\n

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\n\nFor Teachers\n\n6th - 8th\n\nStandards\n
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\nWhen mathematical errors happen, part of the learning is to figure out how it affects the rest of your calculations. The activity has your mathematicians solving for the area of a circular pipe and taking into consideration any errors...\n
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Instructional Video3:19
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\n\"How\n\n
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\nCurated OER\n
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\nHow Do You Find the Area of a Circle if You Know the Radius?\n

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\n\nFor Teachers\n\n6th - 8th\n
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\nThere are basically two things you need to know to find the area of a circle. First, you need to use the correct formula. Second, you have to know the value of the radius. If you know these two things then all you have to do is plug the...\n
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Worksheet
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\n\"Area\n\n
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\nCurated OER\n
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\nArea of a Circle When Radius is Given\n

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\n\nFor Students\n\n5th - 8th\n
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\nFive 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...\n
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Instructional Video1:55
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\n\"Calculating\n\n
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\nCK-12 Foundation\n
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\nCalculating Area of a Circle: Lesson\n

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\n\nFor Students\n\n6th - 11th\n\nStandards\n
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\nIt really is as easy as pi. The segment of a massive geometry playlist points out that the formula for the area of a circle is a relatively simple one. Using the formula, the presenter shows examples of finding the area of circles.\n
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Lesson Plan
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\n\"The\n\n
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\nCurated OER\n
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\nThe Area of a Circle\n

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\n\nFor Teachers\n\n8th\n
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\nEighth graders find the circumference and diameter of several lids, show the relationship of the two measurements and derive the formula for finding the area of a circle. In this area of a circle lesson plan, 8th graders find...\n
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Instructional Video4:18
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\n\"Area\n\n
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\nCorbett Maths\n
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\nArea of a Circle\n

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\n\nFor Students\n\n6th - 12th\n\nStandards\n
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\nCircle back and use the resource to review area. Young pupils see how to find the area of a circle given its radius or diameter. The instructive video also shows an example of how to find the radius given the area. \n
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Lesson Plan
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\n\"The\n\n
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\nEngageNY\n
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\nThe Area of a Circle\n

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\n\nFor Teachers\n\n7th\n\nStandards\n
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\nIntroduce learners to two methods to estimate the formula for the area of a circle. The first method uses a sector of a circle to form a rectangle, and the other uses grids to estimate the area. The problems in the 18th segment of a...\n
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Instructional Video6:13
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\n\"What\n\n
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\nCurated OER\n
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\nWhat is the Formula for the Area of a Circle?\n

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\n\nFor Teachers\n\n6th - 10th\n
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\nCut up a circle and make a parallelogram! What? No way! Yes way! Watch the instructor illustrate just how to cut up the circle and get that parallelogram to then get the formula for the area of a circle. It really works! Base,...\n
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Instructional Video4:01
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\n\"How\n\n
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\nCurated OER\n
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\nHow Do You Find the Area of a Circle if You Know the Diameter?\n

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\n\nFor Teachers\n\n6th - 8th\n
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\nDo you know the formula to find the area of a circle? Do you know the value of pi? Do you know what the relationship is between diameter and radius? Yes? Then you can solve this problem. If your scholars don't know this formula then this...\n
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Worksheet
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\n\"Quiz:\n\n
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\nCurated OER\n
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\nQuiz: Area of a Circle\n

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\n\nFor Students\n\n7th - Higher Ed\n
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\nGeometers test their mastery at finding the area of a circle with 10 basic problems. Circle diagrams show line segments, points, and diameter. Distance of radii are given. They use pi as 3.14 to calculate the area. No answer key is...\n
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\n\"Eight\n\n
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\nIllustrative Mathematics\n
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\nEight Circles\n

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\n\nFor Teachers\n\n6th - 9th\n\nStandards\n
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\nWe are used to finding the area of a circle by plugging the radius into an equation. Here, learners are required to go further to find multiple areas and calculate the difference. They must detect a pattern in order to figure out the...\n
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Worksheet
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\n\"Geometry:\n\n
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\nCurated OER\n
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\nGeometry: Calculating the Area of a Circle\n

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\n\nFor Students\n\n7th - 9th\n
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\nIn this area worksheet, learners use the perimeter or radius to determine the area of a circle. This one-page worksheet contains 8 problems. This worksheet may be produced in printed form. Answers may be viewed on-line.\n
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Worksheet
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\n\"Area\n\n
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\nCurated OER\n
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\nArea of a Circle\n

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\n\nFor Students\n\n10th\n
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\nIn this geometry learning exercise, 10th graders are asked to calculate the area of a circle given the radius of the circle. There is an answer key for these 9 problems.\n
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Assessment
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\n\"Circumscribed\n\n
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\nConcord Consortium\n
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\nCircumscribed Polygon\n

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\n\nFor Students\n\n11th - 12th\n\nStandards\n
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\nTrigonometry teachers often go off on a tangent, and here's a activity that proves it! First, young mathematicians use a formula with tangent to prove a formula correct for area. Then, they draw conclusions about the area of a circle...\n
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Worksheet
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\n\"Area\n\n
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\nCurated OER\n
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\nArea of a Circle Worksheet\n

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\n\nFor Students\n\n6th\n
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\nIn this geometry worksheet, 6th graders identify the area of the four given circles by using the given diameters. There is a space for students to show their work.\n
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Lesson Plan
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\n\"Finding\n\n
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\nCurated OER\n
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\nFinding the Circumference and Area of a Circle\n

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\n\nFor Teachers\n\n6th\n
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\nSixth graders discover what circumference is.  In this measurement activity, 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.\n
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Lesson Plan
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\n\"Area\n\n
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\nCurated OER\n
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\nArea Of A Circle\n

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\n\nFor Teachers\n\n5th\n
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\nFifth graders experience a lesson to investigate the methods for finding the area of a circle. They use the drawing of segments in order to visualize how a circle can be proposed of many parts. Then students brainstorm in order to derive...\n
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Lesson Plan
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\n\"Area\n\n
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\nCurated OER\n
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\nArea Of A Circle\n

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\n\nFor Teachers\n\n8th - 12th\n
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\nStudents investigate the concept of area and how it can be applied to a circle. They use the right formula in order to solve different problems. The teacher leads the class through different examples and serves as a resource during...\n
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\n\"Circumference\n\n
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\nIlluminations\n
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\nCircumference and Areas of Circles\n

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\n\nFor Teachers\n\n7th - 12th\n\nStandards\n
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\nMiddle and high schoolers listen to a scenario about a puppy and use the scenario to develop formulas in order to find the area of a circle. In this circumference lesson, pupils understand how to find the radius, diameter, area of a...\n
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\n\"Task:\n\n
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\nCurated OER\n
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\nTask: Grain Storage\n

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\n\nFor Teachers\n\n7th - 10th\n\nStandards\n
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\nFarming is full of mathematics, and it provides numerous real-world examples for young mathematicians to study. Here, we look at a cylinder-shaped storage silo that has one flat side. Given certain dimensions, students need to determine...\n
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\n\"Covering\n\n
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\nCurated OER\n
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\nCovering and Surrounding\n

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\n\nFor Teachers\n\n5th - 6th\n
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\nPupils develop techniques for estimating the area of a circle and use ideas about area and perimeter to solve practical problems. In this area and perimeter lesson, students apply the concepts of perimeter and area to the solution of...\n
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\n\"Proving\n\n
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\nEngageNY\n
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\nProving the Area of a Disk\n

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\n\nFor Teachers\n\n9th - 10th\n\nStandards\n
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\nUsing a similar process from the first lesson in the series of finding area approximations, a measurement resource develops the proof of the area of a circle. The problem set contains a derivation of the proof of the circumference...\n
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