Corbett Maths
Angles in a Full Circle
Come full circle with a lesson on angles. A noteworthy video describes how to calculate the measures of missing angles in a diagram. It goes through several examples in which the sum of the angles is always a full circle, or 360 degrees.
CK-12 Foundation
Measuring Angles: Lesson
Develop a degree of measurement. With the aid of a protractor, the video shows how to measure angles. The segment of a larger playlist on geometry basics points out that it is possible to start at a value other than zero when measuring...
Math Antics
Angles and Degrees
How do you determine the size of an angle? Pupils learn about degrees and how to measure the size of an angle. The video associates the measurements to types of angles such as acute, obtuse, and right. The additive properties of angle...
Khan Academy
Khan Academy: Geometry: Measuring Angles in Degrees
Explains how to measure an angle in degrees using a protractor. Defines acute, right, and obtuse angles. Practice problems available. [8:22]
Math Mammoth
Math Mammoth: Estimating Angles
Demonstrates how to estimate the size of an angle by comparing it to a familiar common angle. [6:59]
Khan Academy
Khan Academy: Acute, Right, and Obtuse Angles
Explains the properties of acute, right, and obtuse angles. [5:33]
CK-12 Foundation
Ck 12: Elem Math: Overview Sum of the Angles of a Triangle
[Free Registration/Login may be required to access all resource tools.] Students watch a video overview on funding the sum of angles in a triangle.
Khan Academy
Khan Academy: Measuring Angles in Degrees
Explains what a protractor is and how it is used to measure the size of angles. Also discusses the different types of angles. [8:23]
CK-12 Foundation
Ck 12: Elem Math: Overview of Angles
[Free Registration/Login may be required to access all resource tools.] Video providing a detailed explanation of what angles, segments, rays, and vertexes are, and how angles are named and measured. [4:23]
CK-12 Foundation
Ck 12: Elem Math: Overview of Classification of Angles
[Free Registration/Login may be required to access all resource tools.] Video describing four types of angles - right, acute, obtuse and straight. [1:19]
CK-12 Foundation
Ck 12: Elem Math: Overview of Measurement of Angles
[Free Registration/Login may be required to access all resource tools.] Video demonstrating how angles are measured in degrees using a protractor and some types of angles. [2:03]
Loyola University Chicago
Math Flix: Complementary and Supplementary Angle Definitions
This video provides an opportunity to learn about complementary and supplementary angles. As you watch and listen to the teacher and student interact it helps clarify the thinking behind applying this concept. [3:41]
Other
Corbettmaths: Videos and Worksheets for Math
Click on Videos to find Videos and Workshops for math videos, practice questions, and textbook exercises for math. It includes shapes, addition, algebra, Algebraic fractions, Angles, Area, Averages, and much more. Answers are provided.
Math Mammoth
Math Mammoth: Lines, Rays, and Angles
Explains what lines, line segments, rays, and angles are, and how to measure an angle opening. [6:28]
Khan Academy
Khan Academy: Angles: Using a Protractor
Shows how to use a protractor to measure an angle. Identifies different types of angles: acute, obtuse, right.
Khan Academy
Khan Academy: Angles: Angle Basics
Definition of an angle. How to denote an angle using points on the angle (including the vertex)
Khan Academy
Khan Academy: Decomposing an Angle
Video explores how to find the measure of angles by adding or subtracting. [1:42]
Khan Academy
Khan Academy: Decomposing Angles
Video lesson explains how to find the measure of an angle using addition. [3:04]
Khan Academy
Khan Academy: Constructing Angles
Sal uses a protractor to create 10 degrees and 155 degrees angles. [2:41]
Khan Academy
Khan Academy: Classifying Triangles by Angles
You say you can't categorize a triangle because you don't know the length of the sides. Guess what? If you know the size of the angles you can!
Khan Academy
Khan Academy: Recognizing Angles
Sal identifies acute, obtuse, and right angles in diagrams and pictures.
Khan Academy
Khan Academy: Drawing Acute, Right and Obtuse Angles
Learn how to draw acute, right, and obtuse angles with given points.
