In this activity, students investigate the sum of the measures of the interior angles of a triangle. They will explore interior angles, and their relationship with the exterior angles of a triangle.

On this site a viewer can learn about the different types of triangles, and categorized by either angles or sides. Tutorials are also included for interior and exterior angles of triangles. A teacher resource page includes a lesson plan...

Investigate vertically opposite, corresponding, and alternate angles formed by parallel lines and a transversal using this highly interactive Learn Alberta math. Be sure to follow the link to the printable activities, solutions, learning...

[Free Registration/Login may be required to access all resource tools.] In this lesson students apply the Exterior Angles Theorems. Students examine guided notes, review guided practice, watch instructional videos and attempt practice...

The Geometry tutorial discusses interior and exterior angles of a polygon. Sample exercises with explanations are included.

[Free Registration/Login Required] In this Flipchart, students explore linear pairs and vertical angles. Students determine the measure of interior and exterior angles.

This activity uses the graphing calculator to show the relationship between an exterior angle of a triangle and the two remote interior angles.

Intermath Dictionary's site defines terms relating to angles, gives examples, and offers interactive exercises.

[Free Registration/Login Required] Students explore the concept of the exterior angles theorem by navigating through the interactive learning module and then answering questions that go along with the module. Students can also learn more...

Students discover properties of interior and exterior angles of convex polygons using the TI-89 and Geometer's Sketchpad.

Students will expore the interior and exterior angle of 3 polygons and develop the formula to calculate the sum of degrees without the measurement of the angles being taken.

Dr. Math at the Math Forum offers a way of remembering alternate exterior and alternate interior angles by looking at the words and realize what they say and apply it to the picture.

In Spanish. This site discusses the angles relative to the circles. It defines the concept of central angle, inscribed, interior, exterior and some important geometric outcomes and applications which uses these concepts.

In this activity, students learn and increase their knowledge about the angles formed when parallel lines are cut by a transversal.

In this Cyberchase video segment, Harry tries to snowboard and learns how to measure and identify many common angles.

This tutorial provides a definition of corresponding angles and additional information is provided on angles.

[Free Registration/Login Required] This flipchart is a look at angles in geometry. Drawing, labeling, measuring, special angles: (right, straight, acute, obtuse) and congruence.

Students investigate the sum of the measures of the interior angles of a triangle. This activity explores interior angles, and their relationship with the exterior angles of a triangle [Requires Adobe Reader.]

[Free Registration/Login may be required to access all resource tools.] This study guide reviews terminology for triangles, triangle properties, different types of triangles, and interior and exterior angle theorems.

A complete reference guide to types of triangles and triangle perimeter and area. It provides definitions and interactive animated activities that enhance further explanation.

Get the definition and properties of a polygon. Then explore such topics as: 1) types of polygon 2) area 3) Perimeter 4) angles associated with polygons and 5) names of polygons.

[Free Registration/Login Required] Explore the relationships between parallel lines and the rules of angle measurements.

This site is a "modeling of the Great Pyramid of Khufu". The method used is "Virtual Reality Modeling Language" or "VRML". Every angle on the exterior and interior is displayed in great detail and with diagrams.

The CyberSquad has to deal with angles and distances to locate a treasure chest in this video segment from Cyberchase.