Instructional Video
Virtual Nerd

Virtual Nerd: What Are the Endpoints of a Line Segment?

9th - 10th Standards
Watch this tutorial to learn about the endpoints of a line segment. [1:18]
Instructional Video
Virtual Nerd

Virtual Nerd: What Is a Line Segment?

9th - 10th Standards
Take a look at this tutorial to learn about line segments, how to name them, and what the midpoint of a line segment is. [3:13]
Instructional Video
Virtual Nerd

Virtual Nerd: What Is an Angle?

9th - 10th Standards
Take a look at this tutorial to learn about how an angle is formed, how to name an angle, and how an angle is measured. [4:45]
Instructional Video
Khan Academy

Khan Academy: Geometry: Identifying Parallel and Perpendicular Lines

9th - 10th Standards
Identifying parallel and perpendicular lines in a diagram. [3:34]
Instructional Video
Khan Academy

Khan Academy: Identifying Parallel and Perpendicular Lines

9th - 10th Standards
Identifying parallel and perpendicular lines in a given diagram.
Instructional Video
Khan Academy

Khan Academy: Angles Formed Between Transversals and Parallel Lines

9th - 10th Standards
This video explains the relationship between the measures of angles formed when parallel lines are cut by a transversal.
Instructional Video
Khan Academy

Khan Academy: Geometry: Angles Formed Between Transversals and Parallel Lines

9th - 10th Standards
Explains the relationship between the measures of angles formed when parallel lines are cut by a transversal based on relationships of corresponding, vertical, and supplementary angles. [7:53]
Instructional Video
Art of Problem Solving

Art of Problem Solving: Angles and Parallel Lines

9th - 10th Standards
Video tutorial discusses the relationships among angles formed when a transversal intersects parallel lines. [5:54]
Instructional Video
Study Pug

Study Pug: Perpendicular Line Proofs

9th - 10th Standards
Video lesson explains angles, lines, and transversals. [9:33]
Instructional Video
Sophia Learning

Sophia: Drawing Line Relationships: Lesson 2

9th - 10th Standards
This lesson will demonstrate how to draw intersecting, perpendicular, and parallel lines.
Instructional Video
Shmoop University

Shmoop: Parallel Lines and Transversals

9th - 10th Standards
A video clip showing parallel lines and transversals. Using everyday items to familiarize the student with the concept.