Radius Teacher Resources

Find Radius educational ideas and activities

Showing 41 - 60 of 2,429 resources
Tenth graders explore circles.  In this geometry instructional activity students investigate the relationships between the diameter and circumference of a circle and between the radius and area of a circle.  The dynamic nature of TI-nspire provides opportunity for conjecture and verification. 
Sixth graders review the three parts of a circle: the radius, diameter and circumference. They practice calculating one of the parts given the other two dimensions and their relationship to one another. They use a spreadsheet program to check their chart work.
Young scholars explore the concept of area of circles and rings. For this area of circles and rings lesson, students use construction paper and scissors to aid finding the area of circles and rings. Young scholars examine the effect halving a radius of a circle has on the area of the circle.
In this circumference worksheet, students determine the circumference of a circle when given the diameter or the radius. This three-page worksheet contains 20 problems. This interactive worksheet may be completed on-line or presented in printed form.
High schoolers explore properties of tangent lines.  In this properties of tangent lines lesson, students discuss the perpendicular relationship between a tangent line on a circle and the circle's radius.  High schoolers use that relationship to determine unknown distances.
Sixth graders explore and construct circles, using such tools as compasses and rulers. They also develop definitions for identifying the center, radius, diameter, chord, and circumference.
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.
Learners explore the concept of rate of change. In this rate of change lesson, students record the rate of change of the radius of a blowpop as a learners sucks on the blowpop. Students use derivatives to find the rate of change.
Eighth graders demonstrate an understanding of circles by finding relationships among the radius, diameter, and circumference. In this circles lesson, 8th graders complete an Olympic Medal Count project where they discuss and determine information obtained from circles.
In this circles and triangles worksheet, learners find the center, radius, area, and more, of circles and triangles. Students complete 4 problems.
Young scholars identify parts of the circle including center, radius, diameter, chord, and arc. In this circles lesson plan, students work in pairs to create circles on a geoboard. Young scholars then work in cooperative groups and use colored chips, chart paper, and Venn Diagram. Students form circles on the paper and then label the parts of a circle.
Students analyze and demonstrate how a circle can be measured in square units and examine how diameter, circumference and radius are related.
In this calculating the radius and diameter activity, students observe two circles, one with the radius and calculate its diameter and one with the diameter and calculate its radius and then estimate their circumferences. Students solve 2 problems. 
In this circles instructional activity, high schoolers answer 12 questions about circles. Students find the radius, diameter, circumference, and area of three circles given a diagram.
In this online math worksheet, high schoolers determine the radius, circumference, diameter and area of circles. This excellent resource allows the students to check their answers, and to get "hints" should they run into difficulties. A terrific teaching tool!
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.
Young scholars identify the radius and diameter of a circle. In this geometry lesson plan, students calculate the volume and area of a cylinder and circle. They relate the circumference of a circle to Pi.
In this geometry skills practice worksheet, students solve 2 problems that require them to calculate radius and calculate diameter.
Five 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 for middle schoolers, I'd have them multiply the results completely.
In this radius, diameter and circumference worksheet, students calculate radius and diameter and estimate the circumference of 2 circles. A reference web site is given for additional activities.

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