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Lesson Plan
Curated OER

Square Circles

For Teachers 6th - 7th
Young scholars analyze and demonstrate how a circle can be measured in square units and examine how diameter, circumference and radius are related.
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Lesson Plan
Curated OER

Covering and Surrounding

For Teachers 5th - 6th
Students develop techniques for estimating the area of a circle and use ideas about area and perimeter to solve practical problems. For this area and perimeter lesson, students apply the concepts of perimeter and area to the solution of...
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Worksheet
Curated OER

Circle Area, Perimeter and Circumference #2

For Students 5th - 6th
In this area, perimeter and circumference worksheet, students determine radius and circumference of given circles. A reference web site is given for additional activities.
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Worksheet
Curated OER

Find Radius/Diameter

For Students 2nd - 10th
In this geometry worksheet, students calculate the radius and the diameter of the five given circles. There is an answer key included.
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Lesson Plan
Curated OER

Geometry: Area, Scale Factor, Circumference

For Teachers 5th - 8th
In this geometry worksheet, young scholars 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

Algebra Review For Grade 6

For Students 6th - 7th
Use this algebra worksheet as a review for your charges. Learners answer 10 multiple choice questions about sixth grade math, not interactively, with answers available online.
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Lesson Plan
Curated OER

3.14159265

For Teachers 9th - 12th
High schoolers discover the value of Pi.  In this value of Pi lesson, students measure the circumference and diameter of various circles on their graphing calculator.  High schoolers find the ratio of the circumference to the...
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Worksheet
Curated OER

Circumference of Circle

For Students 4th - 6th
In this circumference activity, learners find circumference. Radius and diameter are given, as well as an answer key. Workspace is provided.
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Worksheet
Curated OER

Lab Activity: Model of the Planets

For Students 7th - 10th
This worksheet leads the class through the calculations needed to construct circles to represent the planets of our Solar System. The actual values are provided, as are suggested calculations to create the scale diameters. The ten...
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Worksheet
Curated OER

Parts of the Circle

For Students 5th - 6th
For this circles worksheet, students complete multiple choice questions, determining whether diameter, radius, chord or center is shown on a circle. A reference web site is given for additional activities.
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Lesson Plan
Curated OER

Parts of a Circle

For Teachers 6th
Sixth graders use yarn, paper plate, and other materials to identify parts of a circle. In this parts of a circle lesson plan, 6th graders identify the circumference, radius, diameter, and other parts of a circle.
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Lesson Plan
Curated OER

An Introduction to Pi and the Area of a Circle

For Teachers 5th - 7th
Learners explore measurements of a circle. In this lesson about circumference and radius, students practice calculating measurements of a circle. Learners estimate, calculate, and practice with graphing all while learning how to find...
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Interactive
Curated OER

Circles

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

Geometry: Shapes, Area, Perimeter

For Students 6th - 8th
For this geometry worksheet, students match 5 shapes to several terms, determine the radius and diameter from 2 diagrams, and find the area and perimeter of 3 problems.
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Worksheet
Curated OER

Arcs and Chords

For Students 10th
In this arcs and chords instructional activity, 10th graders solve 7 different types of problems related to identifying arcs and chords in a circle. First, they find the measure of each arc to the nearest tenth, if O is the center point....
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Lesson Plan
Curated OER

Circles and Pi

For Teachers 9th - 11th
Students identify the relationship between the radius and Pi. For this geometry lesson, students calculate the circumference and area of a circle. They create visuals to help them see how the circumference relates to Pi.
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Worksheet
Curated OER

Circumference and Area

For Students 6th - 8th
In this geometry worksheet, students answer 10 questions regarding, circumference, area, time, calculating the radius if given a diameter, and polygon recognition.
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Lesson Plan
Curated OER

Geometry of Circles: Week 7

For Teachers 10th - Higher Ed
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.
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Lesson Plan
Curated OER

Geometry of Circles - Week 7 (Area & Circumference)

For Teachers 12th - Higher Ed
In this circle worksheet, young scholars solve problems involving the circumference, area and arc length in a circle. They explore the union of circles and semicircles, as well as the line segments tangent to the circle. This two-page...
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Worksheet
Curated OER

Volume Word Problems

For Students 10th
In this volume worksheet, 10th graders solve 10 different word problems that include determining the volume in each one. First, they determine the ratio of their radius given the cubic meters of a sphere. Then, students determine the...
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Interactive
Curated OER

Online Math Learning: Surface Area of Spheres

For Students 9th - 12th
In this surface area of spheres activity, high schoolers solve 4 short answer problems. Students find the surface area of spheres, hemispheres, and cones given a radius or a radius and height.
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Worksheet
Curated OER

3D Shapes

For Students 10th
In this 3D shapes worksheet, 10th graders solve and complete 6 various types of problems. First, they find the radius of a cylinder described. Then, students determine the volume of a pyramid shown. In addition, they find the volume of...
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Worksheet
Curated OER

Arcs and Sectors

For Students 10th
In this arcs and sectors worksheet, 10th graders solve and complete 2 different types of problems. First, they find the radius of a circle with a given circumference. Then, students find the perimeter of the given sector and the area of...
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Worksheet
Curated OER

A Different Proof of the Law of Cosines

For Students 9th - 12th
In this proofs worksheet, students construct 1 proof of the law of cosines.  Students construct a right triangle within a circle to  prove the law of cosines.

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