Curated OER
Circle Problem
In this geometry worksheet, students calculate what the maximum number of regions are that 8 chords can divide a circle. They follow a pattern to arrive at their answers. There is an answer key with this question.
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Circles and Squares
In this area activity, students find the ratio of 1 area problem. Students find the ratio of areas of inscribed circles to circumscribed squares.
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Perimeter and Circumference
In this geometry instructional activity, 10th graders determine the perimeter of various polygons and the circumference of circles. The two page instructional activity contains twelve problems. Answers are provided.
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Chords of a Circle
In this geometry worksheet, 10th graders calculate the length of a chord and the distance from the center of a circle or radius. They compare diameter, chords and radius. There are 10 questions with an answer key.
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Everyday Objects with Shapes
Students explore geometric shapes. In this geometry and language development lesson, students take a walk and look for shapes in the objects outdoors. Students match each of four individual paper shapes they are...
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Semicircles
In this geometry instructional activity, 10th graders are presented with a problem involving semicircles. The diagram appears simple, though it turns out to have a many segments to be labeled with variables. The key to...
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Calculate the Radius
In this calculating radius activity, 6th graders find the radius of 5 circles given the circumference information. Students must write the radius on the line provided and a box is provided to them to show their work.
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Calculate the Diameter
In this diameter instructional activity, 6th graders find the diameter of 5 circles. Students are given the formula for circumference and circumference information along with a blank box to complete their work.
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Calculate the Area
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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Calculate the Circumference
In this calculate the circumference learning exercise, 7th graders find the circumference given the diameter of 4 circles; the formula and the answers are provided.
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Find Radius of the Circles
In this finding the radius of circles worksheet, students must calculate the radius of 4 circles. Students are given diameter and must write the radius on the line for each circle.
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Finding the Sum of the Perimeters of 3 Small Circles
In this geometry instructional activity, students find the sum of the perimeters of three small circles. These small circles are tangent to each other and to a larger circle. The centers of the small circles have their...
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Arc and Angles Formed by Secants and Tangents
In this calculus worksheet, students solve problems by finding the line of tangency and measure of the arcs and angles form by a secant line. There are 9 questions.
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Mixed Review on Formulas & Theorems on Geometry of Circles
In this geometry worksheet, 10th graders review the formulas and theorems on circles. Problems are comprehensive and detailed. The worksheet is eleven pages long and contains nine problems. Not all answers are...
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A Different Proof of the Law of Cosines
In this proofs learning exercise, 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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Circles and Parabolas
In this circles and parabolas learning exercise, learners follow directions to draw parabolas. They fold paper to represent a parabola. Students also use straight lines to create a circle. This one page learning exercise contains three...
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A Walk Around the Earth
In this walk around the earth problem, students determine how much farther your head travels than your feet. They use the circumference of the earth and pi to determine the distance traveled. This one page worksheet contains one...
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Circle Circus
Third graders find the radius and diameter of a bubble. In this radius and diameter lesson, 3rd graders create bubbles on their desk and find the radius and diameter of the bubble. Students work in partners to define circle terms and...
Raytheon
Geometry: Circles
In this geometric circumference worksheet, 8th graders calculate the circumference of each of the 18 circles. The remaining pages of the worksheet include formulas and lesson ideas on finding the circumference of circles.
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Arcs and Angles Formed by a Tangent and a Chord
In this math activity, 10th graders solve problems involving a tangent line intersection the arc and forming various angles. There are 6 problems to be solved.
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New York State Testing Program
In this state testing worksheet, students solve problems on a variety of topics studied throughout the year. They find the median, solve algebraic equations, solve proportions, simplify expressions, find percents, and complete...
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Yoplait with Areas and Volumes
For this areas and volumes worksheet, students find the area of truncated cones and elliptical cylinders. They find the area by using one of three methods: the disk method, the shell method, and using geometry. This...
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Calculation the Cricumference of Earth using "Google Earth"
Eighth graders investigate properties of circles. For this eight grade mathematics lesson, 8th graders apply proportional reasoning to data gathered with “Google Earth” to calculate equatorial and polar circumference of the...
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Polygon People
Students identify polygons. In this polygon people lesson, students draw required shapes and construct a polygon person. They identify each shape and its characteristics. The lesson may be extended by allowing students...