Khan Academy
Khan Academy: Geometry: The Pythagorean Theorem
This video tutorial is n introduction to the Pythagorean theorem. The instructor explains how to use the Pythagorean theorem to find the length of the hypotenuse or the length of one of the legs. At the end of the video, practice...
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: Statistics: Inferring Population Mean From Sample Mean
Explanation of the difference between population and sample mean. Includes notation and reasons for using sample mean to infer information about a population. [10:02]
Khan Academy
Khan Academy: Similar Triangle Example Problems
Demonstrates how to determine if triangles are similar based on AA, SSS, or SAS similarity postulates. Five different pairs of triangles are compared. [9:23]
Khan Academy
Khan Academy: Probability: Addition Rule for Probability
Video defining the addition rule for probability, including finding the probability of mutually exclusive events. [10:43]
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Khan Academy: Algebra: The Coordinate Plane
This video demonstrates how to identify the ordered pair of a point graphed on the coordinate plane and how to graph a point when given the ordered pair. It also goes a step further and demonstrates how to graph a geometric figure based...
Khan Academy
Khan Academy: Vi Hart: Doodling in Math: Spirals, Fibonacci (Part 3 of 3)
Video explaining how the Fibonacci series and other number series show up in plant growth patterns. [6:07]
Khan Academy
Khan Academy: Algebra: Multiplying and Dividing Monomials 2
Video demonstrates how to divide by a monomial to find the height of a cylinder with a given volume and radius. [4:05]
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Khan Academy: Geometry: Angles at the Intersection of Two Lines
Explains how to determine the measures of angles formed by interecting lines when given the measure of one angle. [7:19]
Khan Academy
Khan Academy: Algebra: Scientific Notation Examples
Video with multiple examples of writing large and small numbers in scientific notation. Includes multiplying and dividing numbers in scientific notations. [12:49]
Khan Academy
Khan Academy: Algebra: Asymptotes of Rational Functions
Video explains what asymptotes are and demonstrates how to determine the asymptotes of rational functions. Includes rules for horizontal asymptotes based on the highest power of the numerator and denominator of the rational function....
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Khan Academy: Geometry: Ca Geometry: More Proofs
Demonstrates solutions to problems #7-10 of California Geometry released state test questions. Problems address understanding of congruent angle pairs when parallel lines are cut by a transversal, counterexamples, and properties of the...
Khan Academy
Khan Academy: Algebra: Simplifying Radicals
Video working through multiple examples of simplifying radicals by finding the largest perfect square factor. Includes a discussion about how simplifying radicals is the same as using fractional exponents and following the rules of...
Khan Academy
Khan Academy: Geometry: Congruent Parts of Iscosceles Triangles
Proof that if the legs of an isosceles triangle are congruent then the base angles are congruent and vice versa using triangle congruency postulates. The proof is written as a two-column proof. [9:03]
Khan Academy
Khan Academy: Geometry: Other Triangle Congruence Postulates
In this video tutorial [13:28], the instructor identifies the different triangle congruency postulates: SSS, SAS, ASA, AAS. Practice problems available.
Khan Academy
Khan Academy: Geometry: Challenging Triangle Angle Problem
Demonstrates how to find the sum of the exterior angles of an irregular pentagon by breaking the pentagon into three triangles and using the triangle sum theorem. [8:37]
Khan Academy
Khan Academy: Algebra: Simple Equations
This video provides an introduction to solving equations of the form Ax=B. All of the equations include positive integers. Practice problems available. [11:06]
Khan Academy
Khan Academy: Geometry: Similar Triangle Basics
Explains the difference between congruent triangles and similar triangles. Introduces the idea of scale factors. [9:17]
Khan Academy
Khan Academy: Algebra: Variable Expressions
Video shows how to simplify expressions showing multiplication and how to write products with variables without multiplication signs. Also shows how to evaluate expressions by substituting in specific variable values. [12:26]
Khan Academy
Khan Academy: Algebra: Recognizing Linear Functions
Video showing how to determine whether a set of data points represents a function that is linear or nonlinear by first describing what makes something a linear function and then deciding which type of function the points fit. A graph is...
Khan Academy
Khan Academy: Arithmetic and Pre Algebra: The Distributive Property 2
This video shows the distributive property of multiplication over subtraction. Practice problems are available. [2:11]
Khan Academy
Khan Academy: Algebra: Graphical System of Inequalities
This video demonstrates how to graph the solution set for a system of linear inequalities. [5:36]
Khan Academy
Khan Academy: Geometry: Another Isosceles Example Problem
Explains how to use given algebraic expressions for the measures of angles in an isosceles triangle and apply knowledge of the triangle sum theorem and the knowledge that the base angles of an isosceles triangle are congruent to...
Khan Academy
Khan Academy: Geometry: Congruent Triangles and Sss
In this video tutorial [11:29], the instructor explains how to use triangle congruence to identify measures of corresponding sides and angles in triangles. Defines side-side-side (SSS) postulate. Practice problems available.