PBS
Pbs: Measurement and Geometry: Angles: Vertical and Congruent
Vertical angles lie diagonally opposite one another at an intersection and are always equal in measure. This makes them congruent.
Khan Academy
Khan Academy: Geometry: Example Involving Isosceles Triangle and Parallel Lines
Demonstrates how to use the triangle sum theorem, properties of isosceles triangles, and special angle pairs formed when parallel lines are cut by a transversal to set up an equation using given algebraic expressions for angle measures...
Khan Academy
Khan Academy: Geometry: Similar Example Problems
Explains how to identify and use similar triangles in order to determine unknown side lengths in two given diagrams. Each diagram also applies knowledge of angles formed when parallel lines are cut by a transversal. [7:37]
Khan Academy
Khan Academy: Geometry: Congruent Triangle Proof Example
Demonstrates how to use triangle congruency to prove that a given point is the midpoint of a given line segment. The proof is written in the form of a two-column proof. Practice problems available. [5:46]
Study Pug
Study Pug: Perpendicular Line Proofs
Video lesson explains angles, lines, and transversals. [9:33]
Khan Academy
Khan Academy: Geometry: Language and Notation of the Circle
Formally defines a circle and different parts of a circle. Identifies the proper notation for naming different parts of a circle. [11:12]
Loyola University Chicago
Math Flix: Symmetry Intro 2
This QuickTime movie further develops the introduction to this basic geometric term, symmetry, by creating several several objects with lines of symmetry. As you watch and listen to the teacher and student interact it helps clarify the...
Loyola University Chicago
Math Flix: Tranformations Coordinate Plane 2 Flip, Slide
This QuickTime movie provides an opportunity to look at what graphing a transformation looks line on the coordinate plane. As you watch and listen to the teacher and student interact it helps clarify the thinking behind applying this...
Khan Academy
Khan Academy: Find Measure of Vertical Angles
Demonstrates how to find unknown angles for two intersecting lines when some angle information is given. [3:00]
Khan Academy
Khan Academy: Geometry: Circle Area Chords Tangent
This video [10:06] contains touches the following topics: Pythagorean theorem, 45-45-90 triangles, 30-60-90 triangles, circumscribed polygons, area, chord length and tangents to circles.
PBS
Pbs Learning Media: Real Life Math: Woodworker
Listen to a master craftsman explain many of the ways that mathematics is used in woodworking, including number operations; geometry; ratios and proportions; and measurement. In the accompanying activity, students will draw a scale...
Virtual Nerd
Virtual Nerd: What Is a Transversal?
This tutorial introduces transversals and shows what happens when a transversal meets two parallel lines. [6 :22]
Virtual Nerd
Virtual Nerd: What Is a Point?
Points are needed to make lines, planes, angles, or polygons. and also for graphing. Watch this tutorial to learn about points. [3:50]
Khan Academy
Khan Academy: Weighted Average of Two Points
This video [3:56] lesson focuses on how to bridge two worlds: the world of images and geometry and the world of algebra, numbers, and equations. We will develop a formula that will allow us to compute points exactly on the parabola. And...
Khan Academy
Khan Academy: Doodling in Math: Doodling in Math: Connecting Dots
Anti-parabola propoganda, plus musing on math class, cardioids, connect the dots, envelopes of lines, even a bit of origami.
Virtual Nerd
Virtual Nerd: Common Core State Standards Grade 5 geometry5.g.a5.g.a.1 Common Core
Tutorials that show the origins, X and Y coordinates, etc.
Khan Academy
Khan Academy: Geometry: Point Line Distance and Angle Bisectors
Proof that a point on the angle bisector is equidistant from each side of the angle and proof that a point that is equidistant from each side of the angle lies on the angle bisector. [10:57]
Sophia Learning
Sophia: Right Angles
Right angles are defined in this video lesson. Take quiz to assess learning. [1:32]
Sophia Learning
Sophia: Vertical Angles Tutorial
Assess your understanding of vertical angles and whether they are congruent after viewing this video lesson [3:54]
Loyola University Chicago
Math Flix: Symmetry Using the Alphabet
This QuickTime movie uses the alphabet to illustrate the basic geometric term, symmetry. As you watch and listen to the teacher and student interact it helps clarify the thinking behind applying this concept.
Loyola University Chicago
Math Flix: Symmetry Intro 1
This QuickTime movie provides an introduction to the basic geometric term, symmetry. As you watch and listen to the teacher and student interact it helps clarify the thinking behind applying this concept.
Loyola University Chicago
Math Flix: Symmetry Fun Game
This QuickTime movie uses a simple game to illustrate the basic geometric term, symmetry. As you watch and listen to the teacher and student interact, it helps clarify the thinking behind applying this concept.
Loyola University Chicago
Math Flix: Symmetry Using the Polygon
This QuickTime movie uses polygons to illustrate the basic geometric term, symmetry. As you watch and listen to the teacher and student interact it helps clarify the thinking behind applying this concept.
Virtual Nerd
Virtual Nerd: What's the Midpoint Formula?
The midpoint of a line segment is the point located midway between the endpoints of the line segment. Take a look at this tutorial to learn about the midpoint. [1:59]
Other popular searches
- Geometry Lines of Symmetry
- Geometry Lines Points Rays
- Geometry Lines Transversals
- Fourth Grade Geometry Lines
- Geometry Lines and Angles
- Geometry Lines Planes
- Geometry Lines Line Segments
- Geometry Lines Angles
- Grade Geometry Lines
- Geometry Lines Symmetry
- Geometry Lines Transverses
- Geometry Lines and Art