CK-12 Foundation
Ck 12: Geometry: Angles and Transversals Study Guide
This study guide on angles and transversals covers key terms, angle types formed by transversals, postulates and theorems about transversals, and how to prove if lines are parallel or perpendicular. It is available for download with free...
Texas Instruments
Texas Instruments: Angles of a Triangle
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.
Oswego City School District
Regents Exam Prep Center: Angles and Triangles
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...
CK-12 Foundation
Ck 12: Geometry: Exterior Angles Theorems
[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...
Free Math Help
Free Math Help: Interior Angles of a Polygon
The Geometry tutorial discusses interior and exterior angles of a polygon. Sample exercises with explanations are included.
Quia
Ixl Learning: Exterior Angles of Triangles
Brush up on your math skills relating to exterior angles of triangles then try some practice problems to test your understanding.
Texas Instruments
Texas Instruments: Exterior Angle Theorem
This activity uses the graphing calculator to show the relationship between an exterior angle of a triangle and the two remote interior angles.
Shodor Education Foundation
Shodor Interactivate: Angles
This activity from Shodor Education Foundation will help you learn or review your angle vocabulary.
Math Open Reference
Math Open Reference: Parallel Lines
Get the definition for parallel lines and explore angles associated with parallel lines.
University of Georgia
University of Georgia: Inter Math: Exterior Angles
Intermath Dictionary's site defines terms relating to angles, gives examples, and offers interactive exercises.
CK-12 Foundation
Ck 12: Exterior Angles Theorem
[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...
Texas Instruments
Texas Instruments: What's the Angle?
Students discover properties of interior and exterior angles of convex polygons using the TI-89 and Geometer's Sketchpad.
Texas Instruments
Texas Instruments: Angles in a Polygon
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.
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math Alternate Exterior Angles
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.
Texas Instruments
Texas Instruments: Parallel Lines Cut by a Transversal
In this activity, students learn and increase their knowledge about the angles formed when parallel lines are cut by a transversal.
PBS
Pbs Learning Media: What's a 360?
In this Cyberchase video segment, Harry tries to snowboard and learns how to measure and identify many common angles.
Free Math Help
Free Math Help: Exterior Angle of a Triangle
This tutorial discusses exterior angles of a triangle. Example problems with explanations are included.
Government of Alberta
Learn Alberta: Math Interactives: Exploring Parallel Lines (Object Interactive)
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...
The Math League
The Math League: Corresponding Angles
This tutorial provides a definition of corresponding angles and additional information is provided on angles.
ClassFlow
Class Flow: Angles in Geometry
[Free Registration/Login Required] This flipchart is a look at angles in geometry. Drawing, labeling, measuring, special angles: (right, straight, acute, obtuse) and congruence.
Texas Instruments
Texas Instruments: Properties of the Centers of a Triangle
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.]
Math Warehouse
Math Warehouse: Polygons: Formula and Examples
Features numerous exercises relating to exterior angles and interior angles. Includes video tutorials, problems, worksheets and more.
Ministry of Education and Universities of the Region of Murcia (Spain)
Ministerio De Educacion Y Ciencia: Ingulos en Una Circumferencia
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.
Math Open Reference
Math Open Reference: Polygons
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.