Planet Nutshell
Planet Nutshell: Math Shorts: Finding Unknown Angles
Planet Nutshell Math Shorts provide animated videos that explain various math topics. On this site students learn about finding unknown angles by using various angle relationships.
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]
Virtual Nerd
Virtual Nerd: What Are Vertical Angles?
Vertical angles are always congruent to one another. Take a look at this tutorial to learn about and see how to identify vertical angles. [4:07]
Khan Academy
Khan Academy: Sal's Old Angle Videos: Angle Game (Part 2)
Solving for unknown angle measures using knowledge of different angle relationships and the triangle sum theorem.
Khan Academy
Khan Academy: Sal's Old Angle Videos: The Angle Game
Solving for unknown angle measures using knowledge of different angle relationships and the triangle sum theorem.
Khan Academy
Khan Academy: Geometry: Angles (Part 2)
Describes complementary and supplementary angles. Explains how to use properties of complementary and supplementary angles to solve for missing angle measures. Introduces idea that vertical angles (opposite angles) are congruent. [9:05]
Khan Academy
Khan Academy: Angles (Part 2)
Describes complementary and supplementary angles. Explains how to use properties of complementary and supplementary angles to solve for missing angle measures. Introduces idea that vertical angles (opposite angles) are congruent. [9:05]
Sophia Learning
Sophia: Vertical Angles Tutorial
Assess your understanding of vertical angles and whether they are congruent after viewing this video lesson [3:54]
Khan Academy
Khan Academy: Triangles: Wrong Statements in Proofs Example 1
A video analyzing how to recognize wrong statements in a proof. [2:48]
Virtual Nerd
Virtual Nerd: How Do You Find Missing Angles in a Transversal Diagram?
Take a look at this tutorial to see how to find all the missing angle measurements by identifying vertical, corresponding, adjacent, and alternate exterior angles. [4:43]
Khan Academy
Khan Academy: Geometry: Finding More Angles
Solving for measures of the angles in a triangle using algebra, the triangle sum theorem, and properties of angles created by a transversal that cuts parallel lines. [6:05]
Khan Academy
Khan Academy: Geometry: Triangle Angle Example 2
Shows how to find the measure of missing angles using the triangle sum theorem and vertical angles. This video also appears in the Geometry: Triangles strand. [4:55]
Khan Academy
Khan Academy: Angles Formed Between Transversals and Parallel Lines
This video explains the relationship between the measures of angles formed when parallel lines are cut by a transversal.
Khan Academy
Khan Academy: Angles (Part 3)
Identifies and defines the types of angles formed by parallel lines cut by a transversal and the relationship of their measures.
Khan Academy
Khan Academy: Triangles: Triangle Angle Example 2
Shows how to find the measure of missing angles using the triangle sum theorem and vertical angles.
Khan Academy
Khan Academy: Geometry: Angles Formed Between Transversals and Parallel Lines
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]
Khan Academy
Khan Academy: Geometry: Angles Formed by Parallel Lines and Transversals
Identifies which angles are congruent when parallel lines are cut by a transversal. [7:07]
Khan Academy
Khan Academy: Geometry: Angles (Part 3)
Identifies and defines the types of angles formed by parallel lines cut by a transversal and the relationship of their measures. Discusses Triangle Sum Theorem. [9:48]
Art of Problem Solving
Art of Problem Solving: Straight and Vertical Angles
Video tutorial uses examples to reinforce understanding of straight and vertical angles. [5:30]
Khan Academy
Khan Academy: Vertical Angles Are Congruent Proof
Proving that vertical angles are equal.
Sophia Learning
Sophia: Vertical Angles: Lesson 4
This lesson introduces and defines vertical angles. It is 4 of 11 in the series titled "Vertical Angles."
Sophia Learning
Sophia: Vertical Angles: Lesson 8
This lesson introduces and defines vertical angles. It is 8 of 11 in the series titled "Vertical Angles."