CK-12 Foundation
Ck 12: Elem Math: Counting Right Angles in a Turn
[Free Registration/Login may be required to access all resource tools.] Practice counting the number of right angles within sections of a circle in this learning module. Includes video demonstration of a sample problem [2:36] and...
Sophia Learning
Sophia: Complementary and Supplementary Angles
Complementary and Supplementary angles are explored in this tutorial video. [9:17] A PowerPoint presentation provides definitions of angle terms and a video offers examples for finding the missing angle in a supplementary or...
Analyze Math
Analyze Math: Angles in Geometry
Definitions and properties of angles in geometry are explored. Topics discussed are right, acute, and complementary angles. Practice exercises with solutions are included.
BBC
Bbc: Angles
You can pick up some valuable pointers on angles and lines here. When you finish working your way through the pages you can take an on-line "Test Bite," and check your understanding.
Alabama Learning Exchange
Alex: Angle Scavenger Hunt
In this lesson, learners will explore straight, right, acute, and obtuse angles. Students will go on a scavenger hunt throughout the school to search for examples of these types of angles. The learners will use digital cameras to record...
ABCya
Ab Cya: Bow and Angle
Join the heroes Loxley, Arrowyn, Busido, and Mockingbird in this epic adventure of Bows and Angles! Practice measuring and reading angles while you defend yourself from treacherous shadow ninjas.
Math Open Reference
Math Open Reference: Perpendicular
Learn about perpendicular with this helpful reference tool. Provides a detailed definition, examples, and an interactive activity that enhances further explanation. Includes links to related topics.
Cuemath
Cuemath: Perpendicuar
A comprehensive guide for learning all about perpendicular lines with definitions, how to draw them, solved examples, and practice questions
Quia
Ixl Learning: Types of Angles
Brush up on your math skills pertaining to types of angles then try some practice problems to test your understanding.
Other
Nearpod: Special Quadrilaterals
In this lesson on special quadrilaterals, 3rd graders learn key vocabulary, explore right angles and equal side lengths, and apply their learning to a real-world scenario.
Math Is Fun
Math Is Fun: Right Angle
This very basic website gives a clear, simple explanation of what a right angle is.
The Math League
The Math League: Angles and Angle Terms: Right Angle
This tutorial on angles presents a short definition of a right angle.
Quia
Quia: Geometric Terms Flash Cards
Do you need practice remembering or learning different geometry vocabulary words and definitions? The flash cards at this web site are for you! There is a link to a list of terms with definitions you can click if you want to see if you...
Quia
Quia: Geometric Terms Concentration
Do you need practice remembering or learning different geometry vocabulary words and definitions? This concentration game is the web site for you! There is a link to a list of terms with definitions you can click if you want to see if...
Sophia Learning
Sophia: Right Angle: Lesson 1
This lesson defines the phrase right angle. It is 1 of 14 in the series titled "Right Angle."
ClassFlow
Class Flow: Right Angles
[Free Registration/Login Required] The teacher will use this lesson plan to review right angles.
ClassFlow
Class Flow: Right Angles
[Free Registration/Login Required] This flipchart is designed to introduce the student to the concept of the right angle and to give the student practice in identifying right angles as well as measuring angles with a protractor.
ClassFlow
Class Flow: Right Triangles
[Free Registration/Login Required] Use this flipchart to help your high school students understand right triangles using the Pythagorean Theorem.
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.
ClassFlow
Class Flow: Angle Tester
[Free Registration/Login Required] This flipchart reviews right, acute and obtuse angles with students. An Activote review is included at the end.
ClassFlow
Class Flow: Angles
[Free Registration/Login Required] Practice identifying different types of angles in this flipchart. See examples of the different angles.
ClassFlow
Class Flow: Angles Votes
[Free Registration/Login Required] Using this flipchart, students will be able to identify various angles based on mathematical criteria. Questions are related to right, acute, and obtuse angles.
University of Cambridge
University of Cambridge: Nrich: Take the Right Angle
Sharpen your logic, time, and angle recognition skills while working on this challenge. The solution is available to double check your results. (Hint: Use the "90 degree" right angle button on the clock to check if something is a right...