Students identify and define properties of triangles. In this geometry lesson, students identify the missing sides and angles of right triangles. They use the rules of the Pythagorean Theorem to solve their problems.

Students compare and contrast the roles of federal and state governments in the United States. In this government lesson, students research state and national governments' joint and individual powers prior to debating a topic relevant to...

In this geometry worksheet, students draw a shape based on the directions. They tell the reasons the four resulting circles are concurrent. A sample drawing is included.

Sixth graders identify ancient Greek influences in the modern world. In this ancient Greece lesson plan, student research the government, religion, economy, inventions and contributions of Greece. Students participate in a debate about...

Middle schoolers investigate seed germination. In this lesson plan on scientific prediction, students conduct a scientific experiment using oat seeds.

Students compare and contrast the United States and Alaska Constitution. After reading each preamble, they identify the reasons for each constitution to be drafted and discuss what they reveal about citizens responsiblity in government....

Learn all about the point of concurrency. This lesson targets the point of concurrency of perpendicular bisectors, the point of concurrency of the angle bisectors of a triangle, and has interesting solved examples and practice questions.

Learn about points of concurrency with this handy reference guide. Provides a detailed definition and examples that enhance further explanation. Includes links to related topics.

This is the second of two consecutive lesson plans concerning the centers of a triangle. The lesson requires the use of Geometer's Sketch Pad. The lesson contains real world applications of some of the concurrent points of a triangle.

This is the first of two consecutive lesson plans concerning the centers of a triangle. The lesson requires the use of Geometer's Sketch Pad. The lesson contains real world applications of some of the concurrent points of a triangle.

Based off of the hit television show NUMB3RS, this lesson introduces students to Steiner Points, which are essentially points of concurrency within triangles. This is done in the context of a criminal who needs to place a hideout...

You will find an interactive activity to review the following concepts: altitude, median, angle bisector and points of concurrency in triangles. Five different interactive quizzes are also provided to test your knowledge.

This site is an extended lesson on point concurrency in triangles. The page goes through an exploration with the Napoleon Point and the Fermat Point. The site requires the use of GSP.

Students understand that the orthocenter is the point of concurrence of the three altitudes of a triangle. They construct circumcircles and Feuerbach circles and determine the relationship between them.

This site from InterMath gives a description of the orthocenter of a triangle along with a visual representation. Be sure to follow the links to related terms, everyday examples, challenging problems, more information, and the...

A complete reference guide to the centroid of a triangle. It provides definitions, examples, and an interactive activity that enhances further explanation. Includes links to related topics.

Learn about the incenter of a triangle with this handy reference guide. Provides a detailed definition, examples, and an interactive activity that enhances further explanation. Includes links to related topics.

Learn about the orthocenter of a triangle with this handy reference guide. Provides a detailed definition, examples, and an interactive activity that enhances further explanation. Includes links to related topics.

The centroid, circumcenter, orthocenter, and incenter are the four classic centers of a triangle that are studied in geometry. In this activity, you will construct these center points and discover their properties. [Requires Adobe Reader.]

At this site you will find the proof of the existence of the centroid for any triangle.

At this site you will find am online discussion about the centroid of a triangle. The page begins with a discussion of observations leading to the centroid of a triangle. Dr. Math explains the correct findings as well as the errors made...

Learn about concurrent lines with this helpful reference tool. Provides a detailed definition and example.

This site gives the proof that the three perpendicular bisectors of the sides of a triangle are concurrent.

This InterMath site gives a description of the incenter of a triangle along with a visual representation. Be sure to follow the links to related terms, everyday examples, challenging problems, and the interactive check point involving...