ClassFlow
Class Flow: Right Angles
[Free Registration/Login Required] The teacher will use this lesson plan to review right angles.
Free Math Help
Free Math Help: Special Pairs of Angles
The lesson investigates special pairs of angles. Topics explored include complementary, supplementary, and vertical angles. Students learn about the concept and view diagrams and exercises with solutions.
Math Is Fun
Math Is Fun: Acute Angle
This very basic website gives a clear, simple explanation of what an acute angle is.
Varsity Tutors
Varsity Tutors: Hotmath: Algebra Review: Angle Basics
Find a quick, concise explanation of angles and types of angles. Several examples are given to help you understand how angles are formed and the different types of angles.
Varsity Tutors
Varsity Tutors: Hotmath: Algebra Review: Complementary Angles
Find a quick, concise explanation of complementary angles. Several examples are given and explained showing different situations.
Varsity Tutors
Varsity Tutors: Hotmath: Algebra Review: Congruent Angles
Find a quick, concise explanation of Congruent Angles. An example is given and clearly explained.
Math Is Fun
Math Is Fun: Angles on a Straight Line
This very basic website gives a clear, simple explanation of the sum of angles on a straight line that when put together form a straight angle.
Math Is Fun
Math Is Fun: Reflex Angle
This math tutorial provides an illustrated explanation of a reflex angle.
Math Is Fun
Math Is Fun: Straight Angles
Students learn about straight angles. A definition and examples are included.
Math Is Fun
Math Is Fun: Geometry
Students learn about geometry by investigating different shapes and their properties. Topics include plane geometry, drafting tools, transformations, angles, and trigonometry.
Free Math Help
Free Math Help: Angles
The lesson investigates different types of angles used in geometry. Definitions and examples are included.
Shmoop University
Shmoop: Basic Geometry: Angles
The geometry resource explores angles. Descriptions, examples, and practice exercises are included.
Shmoop University
Shmoop: Basic Geometry: Angles in a Polygon
The geometry resource explores angles in a polygon. Notes, examples, and practice problems are included.
Sonoma State University
Sonoma State University: Angle Bisector
This site offers an explanation with words and pictures on how to bisect an angle using a compass and straightedge.
Math Is Fun
Math Is Fun: Congruent Angles
Students learn about congruent angles. A definition, example, and tips are included.
Varsity Tutors
Varsity Tutors: Hotmath: Algebra Review: Supplementary Angles
Find a quick, concise explanation of supplementary angles. Examples are given and clearly explained.
Other
Interactive Stuff: Angle Estimator
Decide which angle is the same as the one drawn by the computer.
University of Regina (Canada)
University of Regina: Math Central: Mathematics Glossary
This site contains the definitions for many geometric terms including transformations.
Math Words
Math Words: Alternate Exterior Angles
Alternate exterior angles are defined with a labeled picture and one of such pairs of angles are exemplified.
Math Words
Math Words: Alternate Interior Angles
This site offers a definition for alternate interior angles with a labeled graph and links to other related words.
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Proof the Inscribed Angle Theorem
Dr. Math gives a student a hint on how to prove that an inscribed angle is equal to 1/2 the central angle. You should know what the central angle and inscribed angle are to utilize this site.