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Creating and Understanding Circles and Their Parts

(Complete Item Description)

Abstract:: This lesson will offer a hands-on opportunity to explore and construct circles. Students will develop a definition for identifying the parts of a circle such as the center, radius, diameter, chord, and circumference. Students will use compasses and rulers in constructing these parts of a circle.

Subject:: Mathematics and Statistics
Grade Level:: Primary
Collection:: LEARN NC Lesson Plans

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Diameter of a circle

(Complete Item Description)

Abstract:: An interactive applet and associated web page that demonstrate the diameter of a circle. The applet shows a circle and a diameter line, the ends of which can be dragged to show that the diameter passes through the center and has a constant length regardless of where on the circle it is drawn. The web page has the circle-related formulae. Applet can be enlarged to full screen size for use with a classroom projector. This resource is a component of the Math Open Reference Interactive Geometry textbook project at http://www.mathopenref.com.

Subject:: Mathematics and Statistics
Grade Level:: Secondary
Collection:: Math Open Reference

Discovering Pi

(Complete Item Description)

Abstract:: This lesson introduces students to Pi through the discovery method of instruction. Students practice simple measuring skills to discover the relationship between the circumference and diameter of circular objects (Pi). They will be able to use this concept to find the circumference of any circle when the diameter is given.

Subject:: Mathematics and Statistics
Grade Level:: Primary
Collection:: LEARN NC Lesson Plans

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Falling Water

(Complete Item Description)

Abstract:: Students drop water from different heights to demonstrate the conversion of water's potential energy to kinetic energy. They see how varying the height from which water is dropped affects the splash size. They follow good experiment protocol, take measurements, calculate averages and graph results. In seeing how falling water can be used to do work, they also learn how this energy transformation figures into the engineering design and construction of hydroelectric power plants, dams and reservoirs.

Subject:: Mathematics and Statistics, Science and Technology
Grade Level:: Primary
SubTopics:: Water , Green Building and Design , Energy
Collection:: TeachEngineering

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Finding the Circle's Center

(Complete Item Description)

Abstract:: In this video segment from Cyberchase, the CyberSquad must find the exact center of a circle in order to save Motherboard.

Subject:: Mathematics and Statistics
Grade Level:: Primary, Secondary
Collection:: Teachers' Domain

Geometry: Circles - Radius, Diameter and Circumference

(Complete Item Description)

Abstract:: This geometry lesson discusses the properties of a circle and defines the ideas of radius, diameter and circumference. [Geometry playlist: Lesson 12 of 31]

Subject:: Mathematics and Statistics
Grade Level:: Secondary
Collection:: Khan Academy

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Thales theorem

(Complete Item Description)

Abstract:: A web page and interactive applet illustrating Thales Theorem (the diameter of a circle always subtends a right angle to any point on the circumference). The applet shows a circle where the user can rotate the diameter and a move a point on the circumference. The applet continuously shows the resulting right triangle, demonstrating that the theorem holds no matter how the points are moved around. Text on the page defines the theorem and relates it to other geometric entities. Applet can be enlarged to full screen size for use with a classroom projector. This resource is a component of the Math Open Reference Interactive Geometry textbook project at http://www.mathopenref.com.

Subject:: Mathematics and Statistics
Grade Level:: Secondary
Collection:: Math Open Reference

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Tricking Hacker

(Complete Item Description)

Abstract:: In this video segment from Cyberchase, the CyberSquad must reclaim the Totally Rad Ring by measuring its radius to create a perfect duplicate.

Subject:: Mathematics and Statistics
Grade Level:: Primary, Secondary
Collection:: Teachers' Domain

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