Khan Academy
Khan Academy: Triangles: Another Pythagorean Theorem Proof
Students explore the Pythagorean Theorem by exploring a visual proof of the Theorem as they watch a video tutorial.
Sophia Learning
Sophia: Proof (Harder)
This geometry resource discusses two types of proof. Video lessons demonstrating a flow proof and a two-column proof are included.
Virtual Nerd
Virtual Nerd: What Is Inductive Reasoning?
Inductive reasoning is observing data and patterns to make predictions. Watch this tutorial to learn about inductive reasoning. [3:48]
Imagine Learning Classroom
Learn Zillion: Revise and Explain Evidence
In this lesson, you will learn how to revise your argumentative essay by telling the reader how the evidence proves your point. [6:02]
Khan Academy
Khan Academy: Triangles: Congruent Triangle Proof Example
Students learn how to prove that two triangles are congruent using midpoint of line segments.
PatrickJMT
Patrick Jmt: Proving an Identity, Example 1
Video tutorial provides examples and tips for proving an identity. [3:34]
Loyola University Chicago
Math Flix: Similar Figures: Proof Using Proportions
This QuickTime movie provides an opportunity to develop the basic geometric term, similar, by checking to see if figures are proportionaly similar. As you watch and listen to the teacher and student interact it helps clarify the thinking...
Khan Academy
Khan Academy: Algebra Ii: Analyzing Polynomial Identities
Sal considers two cases of polynomial identities and their proofs. [7:38]
Khan Academy
Khan Academy: Epistemology: Argument and Evidence
Dr. Greg Ganssle discusses the role of deductive arguments and evidence in deciding what to believe, both in philosophy and more generally.
Sophia Learning
Sophia: Counterexamples: Lesson 5
This lesson will help a learner understand counterexamples. It is 5 of 7 in the series titled "Counterexamples." [3:49]
Sophia Learning
Sophia: Counterexamples: Lesson 6
This lesson will help a learner understand counterexamples. It is 6 of 7 in the series titled "Counterexamples." [1:54]
Sophia Learning
Sophia: Finding a Common Factor for a Trigonometric Expression: Lesson 5
The process of factoring a common value or expression from multiple terms in a trigonometric equation is shown here. This lesson is 5 of 7 in the series titled "Finding a Common Factor for a Trigonometric Expression."
Sophia Learning
Sophia: Finding a Common Factor for a Trigonometric Expression: Lesson 7
The process of factoring a common value or expression from multiple terms in a trigonometric equation is shown here. This lesson is 7 of 7 in the series titled "Finding a Common Factor for a Trigonometric Expression."
Sophia Learning
Sophia: Finding a Common Factor for a Trigonometric Expression: Lesson 1
The process of factoring a common value or expression from multiple terms in a trigonometric equation is shown here. This lesson is 1 of 7 in the series titled "Finding a Common Factor for a Trigonometric Expression."
Sophia Learning
Sophia: Solving an Equation by Applying a Double Angle Identity: Lesson 2
Using a double angle trigonometric identity to help solve an equation is show here. This lesson is 2 of 7 in the series titled "Solving an Equation by Applying a Double Angle Identity."
Sophia Learning
Sophia: Solving an Equation by Applying a Double Angle Identity: Lesson 3
Using a double angle trigonometric identity to help solve an equation is show here. This lesson is 3 of 7 in the series titled "Solving an Equation by Applying a Double Angle Identity."
Sophia Learning
Sophia: Solving an Equation by Applying a Double Angle Identity: Lesson 5
Using a double angle trigonometric identity to help solve an equation is show here. This lesson is 5 of 7 in the series titled "Solving an Equation by Applying a Double Angle Identity."
Sophia Learning
Sophia: Solving an Equation by Applying a Double Angle Identity: Lesson 7
Using a double angle trigonometric identity to help solve an equation is show here. This lesson is 7 of 7 in the series titled "Solving an Equation by Applying a Double Angle Identity."
Sophia Learning
Sophia: Solving an Equation by Applying a Half Angle Identity: Lesson 3
Using a half angle trigonometric identity to help solve an equation is show here. This lesson is 3 of 7 in the series titled "Solving an Equation by Applying a Half Angle Identity."
Sophia Learning
Sophia: Solving an Equation by Applying a Half Angle Identity: Lesson 5
Using a half angle trigonometric identity to help solve an equation is show here. This lesson is 5 of 7 in the series titled "Solving an Equation by Applying a Half Angle Identity."
Sophia Learning
Sophia: Solving an Equation by Converting to Sine and Cosine: Lesson 3
Rewriting trigonometric functions in terms of sine and cosine is shown here as a tool for solving trigonometric equations. This lesson is 3 of 7 in the series titled "Solving an Equation by Converting to Sine and Cosine."
Sophia Learning
Sophia: Solving an Equation by Converting to Sine and Cosine: Lesson 5
Rewriting trigonometric functions in terms of sine and cosine is shown here as a tool for solving trigonometric equations. This lesson is 5 of 7 in the series titled "Solving an Equation by Converting to Sine and Cosine."
Sophia Learning
Sophia: Solving an Equation by Converting to Sine and Cosine: Lesson 6
Rewriting trigonometric functions in terms of sine and cosine is shown here as a tool for solving trigonometric equations. This lesson is 6 of 7 in the series titled "Solving an Equation by Converting to Sine and Cosine."
Sophia Learning
Sophia: Solving an Equation by Converting to Sine and Cosine: Lesson 1
Rewriting trigonometric functions in terms of sine and cosine is shown here as a tool for solving trigonometric equations. This lesson is 1 of 7 in the series titled "Solving an Equation by Converting to Sine and Cosine."