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Calculate the Circumference
For this calculate the circumference worksheet, 7th graders find the circumference given the diameter of 4 circles; the formula and the answers are provided.
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Calculate the Radius
In this calculating radius worksheet, 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 worksheet, 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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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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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 included.
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A Different Proof of the Law of Cosines
In this proofs instructional activity, 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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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...
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Arcs and Angles Formed by a Tangent and a Chord
In this math worksheet, 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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Calculation the Cricumference of Earth using "Google Earth"
Eighth graders investigate properties of circles. In this eight grade mathematics lesson plan, 8th graders apply proportional reasoning to data gathered with “Google Earth” to calculate equatorial and polar circumference of the Earth.
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Cabri Jr. Inscribed Angles
Young scholars construct inscribed angles using Cabri Jr. They draw a circle on their graphing calculator, then construct an inscribed angle and measure its angle measures. Learners drag the inscribed angle around the circle. They make...
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Area and Perimeter of Regular Polygons - An Extension
Pupils explore the relationship between area and perimeter of polygons.They measure the area and perimeter of regular polygons inscribed in a circle. Learners then discuss how as the number of sides of a regular polygon increase, the...
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Segments Formed by Intersectiong Chords, Secants, and Tangents
Learners investigate the properties of segments formed which chords, secants, and tangents, intersect. The dynamic nature of Cabri Jr. allows students to form and verify conjectures regarding segment relationships.
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Cabri Jr. Perpendicular Bisector of a Chord
Your learners will construct the perpendicular bisector of a chord. They use Cabri Jr. to construct a circle and a perpendicular bisector of a chord. They then measure lengths of the chords and perpendicular bisectors. Learners use...
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Circles all Around
Middle schoolers investigate circles. In this middle school mathematics lesson, students explore the relationship between the diameter of a circle and its circumference.
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Circumscribing a Circle About a Triangle
Pupils circumscribe a circle about a triangle. They construct a triangle using Cabri Jr and then circumscribe it. They then use knowledge of perpendicular bisectors and circumcenters to locate the center of the circle and then...
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Parachutes, Circles and Pi...Oh My!
Learners explore different size circles to discover the relationship between diameter and circumference. In this circles and Pi lesson, students construct simple parachutes using circle patterns of varying sizes. Learners predict the...
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3.14159265
Students discover the value of Pi. In this value of Pi lesson, students measure the circumference and diameter of various circles on their graphing calculator. Students find the ratio of the circumference to the diameter and plot the...
Texas Instruments
Exploring Tangents
Explore the concept of tangent lines. In this tangent line lesson, learners graph a circle and two lines on their graphing calculator using Cabri Jr. High schoolers construct the lines so that they both intersect at a given point and are...
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Equations of Circles
Using Cabri Jr. high schoolers construct a circle and determine the equation of the circle they drew by finding the center and the radius. Students use the distance formula to derive the equation of their circle.
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Addition of Shapes
In this addition learning exercise, students count, write and add together 6 sets of different color-coded shapes in the boxes provided. Students totals will average between 10 and 18.
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Phenomenological Pizza
Students explore measurement in terms of pizza toppings. For this math lesson plan, students draw a circle using string and a ruler, determine areas of different size circles, find how many two topping pizzas can be made using 14...
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Circle Identification
In this recognizing circles worksheet, students trace different sizes of circles, the singular word circle and the plural word circles. Students complete six tracing activities.
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Circles - Word Problems
In this geometry problem solving worksheet, students answer 8 words problems based on their knowledge of circles, circumference, radius, diameter, and perimeters. They show their work on the sheet between problems.