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Angles of Parallel Lines - Khan Academy
By Khan Academy
Angles of a transverse line when you intersect parallel lines are discussed in this video. Video discusses parallel lines and what a transverse line is. Video then goes into labeling the angles, such as corresponding angles, opposite angles, alternate interior angles, alternate exterior angles, and supplementary angles. The video shows how to find the measurement of each of the angles using what you know about angles and lines. Good review for concepts of angles and vocabulary associated with angles. Good quality video. Good for middle elementary and middle school students.
Angles (part 3) | Angles and intersecting lines | Geometry | Khan Academy
By Khan Academy
This video uses an electronic black board with different colored pens. Angles formed with two parallel lines (defines parallel lines) and a transversal line (a line that crosses the two parallel lines). The video then goes into labeling the various angles, corresponding angles, opposite angles, alternate interior angles, alternate exterior angles, and supplementary angles. The last thing the video explains is that all the angles in a triangle add up to 180 degrees. It shows how to find the measurements of each of these angles. Good video for review of concepts and angle vocabulary. Good for middle school students.
Flipped Classroom Lines and Angles
By Megan Priole
Draw points, lines, line segments, rays, angles (right, acute, obtuse), and perpendicular and parallel lines.
Parallel and Perpendicular Lines, Transversals, Alternate Interior Angles, Alternate Exterior Angles
By The Organic Chemistry Tutor
parallel and perpendicular lines in addition to transversals and all the angles that are formed by it such as alternate interior and exterior angles.
Find measure of vertical angles | Angles and intersecting lines | Geometry | Khan Academy
By KhanAcademy
Now that we've learned about complementary and supplementary angles, let's use algebra to find the measure of vertical angles, or angles opposite each other when two lines cross.
Proof: Corresponding angle equivalence implies parallel lines | Geometry | Khan Academy
By Khan Academy
Proof by contradiction that corresponding angle equivalence implies parallel lines. All Khan Academy content is available for free at www.khanacademy.org
Angles formed between transversals and parallel lines | Geometry | Khan Academy
By Khan Academy
Khan Academy presents Angles formed between transversals and parallel lines, an educational video resource on math.
Lines, Rays, Line Segments, Points, Angles, Union & Intersection - Geometry Basic Introduction
By The Organic Chemistry Tutor
basic introduction into lines, rays, line segments, points, and angles. It also explains the difference between the union and intersection symbols and contains a few practice problems associated with it.
Lines, Rays, Line Segments, Points, Angles, Union & Intersection - Geometry Basic Introduction
By The Organic Chemistry Tutor
Line segments have a beginning and an end and possess a definite length. Angles are composed of two rays that meet at a common endpoint or a vertex.
Angle basics | Angles and intersecting lines | Geometry | Khan Academy
By Khan Academy
The naming of an angle is related to the line segments that create it. We'll also learn about the angle's vertex. Come on. Let's do this.
Point-line distance and angle bisectors | Geometry | Khan Academy
By Khan Academy
Thinking about the distance between a point and a line. Proof that a point on an angle bisector is equidistant to the sides of the angle and a point equidistant to the sides is on an angle bisector
Angles, parallel lines and transversals
By MathPlanetVideos
Find the value of x in the following figure
Corresponding Angles in Parallel Lines
By MathsMasterOrg
A simple overview of how to identify corresponding angles
Triangle angle example 1 | Angles and intersecting lines | Geometry | Khan Academy
By Khan Academy
Figuring out angles in a triangle. A little about exterior angles being the sum of the remote interior angles
Complementary and supplementary angles | Angles and intersecting lines | Geometry | Khan Academy
By Khan Academy
Basics of complementary, supplementary, adjacent and straight angles. Also touching on what it means to be perpendicular. All Khan Academy content is available for free at www.khanacademy.org
Measuring angles in degrees | Angles and intersecting lines | Geometry | Khan Academy
By KhanAcademy
exact way to measure an angle using a protractor
Triangle angle example 1 | Angles and intersecting lines | Geometry | Khan Academy
By Khan Academy
Figuring out angles in a triangle. A little about exterior angles being the sum of the remote interior angles