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Area of Triangle using the Semi-Perimeter and Radius
Students investigate the properties of circles. In this geometry lesson plan, students calculate the area and perimeter of a triangle. They identify the perimeter and radius length of a circle.
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Circumscribed Polygons
Students investigate polygons and construct ferris wheels. In this geometry lesson, students create a circle and differentiate properties of circles and polygons. They compare the relationship between angles and circumscribed polygons.
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The Circle's Measure
Young scholars explore circumference and diameter. In this math lesson, students apply their knowledge of circumference and diameter to solve mathematical riddles. Young scholars apply this knowledge to find circumference and diameter of...
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Levers in the Body: They Are Not What You Might Think!
Students investigate lever systems in the human body and compare arm anatomy to model. In this human levers activity students graph and analyze their results.
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The Tower of Hanoi
In this Hanoi problem, students explore the movement of eight circular discs fastened to a stand, all of different sizes. Students find the smallest number of moves necessary to stack the discs from the largest to the...
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Space Circles
Fifth graders calculate the diameters and radius of planets as a book is read to them. In this diameter and radius lesson plan, 5th graders read the book Space Circles and calculate the measurements based on the information in this book.
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Six Activities Regarding Circles and Cylinders
In this circles and cylinders activity, students complete six activities answering sixteen questions. These activities include a discovery of the ratio of circumference to diameter and the formula for area of a circle. The...
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Finding the Angle Measurements in Isosceles Triangles
In this angles learning exercise, 9th graders find the angle measurements in four isosceles triangles. Two of these triangles are drawn inside a circle, where two of the sides of the triangles are formed by radii.
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Circles
In this geometry learning exercise, 10th graders apply the circle segment theorems to determine the indicated segment length. The one page learning exercise contains twenty problems. Answers are not provided.
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Graphs and Equations of Conic Sections Practice Test
In this conic section worksheet, students complete a thirty-one question practice test containing matching and problem solving conic equation and conic graph problems. The solutions are provided.
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Find the Radius of the Smallest Circle that Contains the Figure
In this geometry worksheet, students calculate the radius of the smallest possible circle that contains the figure provided. The complete solution is provided by clicking on the "show solution" button found below the problem.
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Circles: Finding Circumference
For this circles worksheet, students find the circumference of 20 circles. Students find the circumference given the radius, diameter, and area of various circles.
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Calculate the Radius
In this radius activity, students calculate the radius of a circle when the area is given to them. Students complete 5 problems total.
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Ten Multiple-Choice Circle Problems
In this circle instructional activity, students solve ten multiple-choice questions concerned with the area, radius, diameter, and circumference of a circle. The solutions are provided by clicking on the "show answers" button on...
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Circumference of Circle
In this circumference activity, students find circumference. Radius and diameter are given, as well as an answer key. Workspace is provided.
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Circumference
In this circumference worksheet, students calculate the circumference of circles with equations including pie and measurements. Students complete 5 problems.
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Basic Circle Worksheet
In this circle worksheet, students identify center, radius and diameter of three circles. An answer key is included on page 2.
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Write the Parts of the Circle in the Place Holders
In this parts of a circle activity, students place the names of 6 different parts of a circle in rectangular place holders. They use labels such as cord, secant, diameter, radius, tangent, and center.
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Area and Circumference of Circles
Eighth graders find the area and circumference of circles. In this area and circumference of circles lesson plan, 8th graders follow a step by step lesson plan and then demonstrate the skills on their own with circles they are given.
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Perimeter and Circumference
Young scholars consider perimeter and circumference. In this lesson on perimeter, students will determine relationships between perimeter and circumference using real life examples.
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Radian, The Snowman
In this snowman worksheet, students label points on a circle with radian measures. They identify the coordinates of the points outside the circle. Students decorate the snowman. This one-page worksheet contain 1...
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Three Tangent Circles
In this tangent circles learning exercise, students use pi to solve a problem involving tangent circles. This one-page learning exercise contains 1 problem. The answer is provided at the bottom of the page.
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Perimeter of a Cirlce
In this perimeter of a circle worksheet, students calculate the perimeter of a circle where either the radius or area is already given. Students complete 6 problems.
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Perimeter of Circle Worksheet
In this perimeter worksheet, students find the perimeter of a circle. This two-page worksheet contains 4 problems. Answers are provided on the last page.