PBS
Pbs: Finding Unknown Angles
Learn how to solve problems that involve finding unknown supplementary, complementary, vertical, and adjacent angles in this Math Shorts video from the Utah Education Network and Planet Nutshell, Inc.
CK-12 Foundation
Ck 12: Geometry: Same Side Interior Angles
[Free Registration/Login may be required to access all resource tools.] This concept introduces students to same side interior angles and how to use them to determine whether or not lines are parallel.
CK-12 Foundation
Ck 12: Geometry: Angles Study Guide
This study guide on angles covers key vocabulary, ways to name angles, how to measure them, the Protractor Postulate and the Angle Addition Postulate, types of angles, congruent angles, angle bisectors, and angle pairs. It is available...
Math Planet
Math Planet: Pre Algebra: Angles and Parallel Lines
Explains angles and parallel lines through examples and a video lesson.
Math Planet
Math Planet: Geometry: Measure and Classify an Angle
Explains the terms and symbols used to discuss line angles, what an angle is, and the types of angles. Includes short video lesson demonstrating how to use a protractor to measure an angle. [0:57]
Khan Academy
Khan Academy: Equation Practice With Angle Addition
Given the sum of a pair of angles and the algebraic expressions that represent them, form and solve an equation. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Khan Academy
Khan Academy: Finding Angle Measures Using Triangles
Use your knowledge of angles to find missing angle measures in various complex situations. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video, or receive hints.
CK-12 Foundation
Ck 12: Geometry: Complementary Angles
[Free Registration/Login may be required to access all resource tools.] In this lesson students solve complementary angle problems. Students examine guided notes, review guided practice, watch instructional videos and attempt practice...
Quia
Ixl Learning: Vertical Angles
Brush up on your math skills relating to vertical angles then try some practice problems to test your understanding.
OER Commons
Oer Commons: Four Types of Angles
In this lesson, students learn about four types of angles: adjacent, vertical, supplementary, and complementary. They explore the relationships between these types of angles by folding paper, measuring angles with a protractor, and...
Texas Instruments
Texas Instruments: Opposite Angles in a Cyclic Quadrilateral
This activity uses Cabri Jr. to discover that opposite angles in a cyclic quadrilateral are supplementary
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.
Math.com
Math.com: Building Blocks: Classifying Angles
This geometry resource investigates types of angles. Definitions, detailed examples, and practice problems are included.
Other
800score: Intersecting Angles
Read a description of intersecting lines and all about the different kinds of angles they form. Includes examples.
Varsity Tutors
Varsity Tutors: Hotmath: Graphing Calculator Practice Problems: Point, Line, Planes, Angles
Practice using your graphing calculator for drawing and labeling points, lines, planes, and angles. If you get stumped or if you would like to check your work, then select the View Solution button, which is located directly under each...
McGraw Hill
Glencoe Mathematics: Online Study Tools: Line and Angle Relationships
This site gives a short interactive quiz which allows students to self-assess their understanding of the concept of line and angle relationships.
Analyze Math
Analyze Math: Parallel Lines and Angles Problems
Try these three problems about finding the measures of different angles that arise from diagrams involving parallel lines and transversals. Detailed solutions are written out for these three problems of moderate difficulty.
Math Open Reference
Math Open Reference: Complementary Angles
Learn about complementary angles with this handy reference guide. Provides a detailed definition and an interactive activity that enhances further explanation. Includes links to related topics.
CK-12 Foundation
Ck 12: Geometry: Supplementary and Complementary Angle Pairs
[Free Registration/Login may be required to access all resource tools.] Classify supplementary and complementary pairs of angles.
CK-12 Foundation
Ck 12: Geometry: Supplementary and Complementary Angle Pairs
[Free Registration/Login may be required to access all resource tools.] Use reasoning to figure out the measures of missing angle measures
Other
Nearpod: Angle Pairs
In this lesson on angle pairs, students explore the relationship betwen angles by learning about adjacent, complementary, supplementary, and vertical angles.
Other
Nearpod: An Introduction to Angles
In this instructional activity, students will learn important definitions about angles relationships an use those facts to solve equations.
CK-12 Foundation
Ck 12: Interactive Geometry: 1.2 Angles and Lines
Explore lines and angles, and the relationship between the two.