Instructional Video
Khan Academy

Khan Academy: Geometry: Angle Bisector Theorem Examples

For Students 9th - 10th Standards
Explains how to use the angle bisector theorem to solve for the sides of a triangle. [3:04]
Instructional Video
Khan Academy

Khan Academy: Geometry: Angles (Part 2)

For Students 9th - 10th Standards
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]
Instructional Video
Khan Academy

Khan Academy: Mobius Strips: Math Improv: Fruit by the Foot

For Students 9th - 10th
Video exploring the concept of a Mobius strip and some of its properties using a Fruit by the Foot.
Instructional Video
Khan Academy

Khan Academy: Geometry: Finding More Angles

For Students 9th - 10th Standards
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]
Instructional Video
Khan Academy

Khan Academy: Geometry: Identifying Parallel and Perpendicular Lines

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

Khan Academy: Geometry: Angles of Parallel Lines 2

For Students 9th - 10th Standards
Explains how to determine the measures of all the angles formed when parallel lines are cut by a transversal based on the measure of one angle. Explains how to use corresponding congruent angles to determine if lines cut by a transversal...
Instructional Video
Khan Academy

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

For Students 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
Khan Academy

Khan Academy: Geometry: Angles (Part 3)

For Students 9th - 10th Standards
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]
Instructional Video
Loyola University Chicago

Math Flix: Pythagorean Theorem Puzzle

For Students 5th - 8th
This QuickTime movie uses a tangram-like puzzle to help understand the Pythagorean Theorem. As you watch and listen to the teacher and student interact it helps clarify the thinking behind applying this concept.
Instructional Video
Khan Academy

Khan Academy: Algebra: Descartes and Cartesian Coordinates

For Students 9th - 10th
Video explaining the contributions of Rene Decartes to Algebra and Geometry. [11:22]
Instructional Video
Khan Academy

Khan Academy: Perpendicular Radius Bisects Chord

For Students 9th - 10th Standards
Proof that if a radius is perpendicular to a chord then it bisects the chord. This video also appears in the Geometry: Circles strand. [6:57]
Instructional Video
Khan Academy

Khan Academy: Algebra: Three Equation Application Problem

For Students 9th - 10th Standards
This video demonstrates how to solve a problem in a geometry context by setting up and solving a systems of equations in three variables. [8:15]
Instructional Video
Khan Academy

Khan Academy: Calculus: 2011 Calculus Ab Free Response #4A

For Students 9th - 10th
This video [4:48] shows how to determine the integral of an unusual function using geometry to find the area under the curve. Also shows how to find the derivative of a function which contains an integral by using the Fundamental Theorem...
Instructional Video
Khan Academy

Khan Academy: Linear Algebra: Vector Triangle Inequality

For Students 9th - 10th
Video first reviews the Cauchy-Schwarz inequality. Then shows a proof of the triangle inequality for vectors and relates it to the triangle inequality from 2-dimensional geometry. [18:53]
Instructional Video
Khan Academy

Khan Academy: Algebra: Conic Sections: Three Points Defining a Circle

For Students 9th - 10th Standards
A video lesson that describes how any three non-collinear points actually define a circle. First it is shown that three points define a triangle. Then it is shown that the circumcenter of that triangle is actually the center of the...
Instructional Video
Loyola University Chicago

Math Flix: Extended Response: Similar Figures Proportion

For Students 6th - 8th
This QuickTime movie explains the solution for a geometry problem working with proportion that requires an extended response. The teacher and student discuss how to work through it together to find the solution. As you watch and listen...
Instructional Video
PBS

Pbs Learning Media: Mighty Mathematicians

For Students Pre-K - 1st Standards
Math is as easy as 1,2,3 with a little help from your favorite PBS KIDS friends. The media in this collection is centered around counting, operations, geometry and more! Dive into each sub-collection and discover new ways to explore math...
Instructional Video
Loyola University Chicago

Math Flix: Similar Figures: Vocabulary

For Students 3rd - 8th Standards
This QuickTime movie provides an opportunity to learn about the basic geometric term similar. As you watch and listen to the teacher and student interact it helps clarify the thinking behind applying this concept.
Instructional Video
Loyola University Chicago

Math Flix: Similar Figures: Ratio

For Students 6th - 8th Standards
This QuickTime movie provides an opportunity to develop the basic geometric term, similar, by using a ratio to see if figures are similar. As you watch and listen to the teacher and student interact it helps clarify the thinking behind...
Instructional Video
Loyola University Chicago

Math Flix: Topology Simple Closed Curves: Part 2

For Students Pre-K - 1st
This QuickTime movie offers a great exploration of how to test a figure to see if it is a simple closed curve. As you watch and listen to the teacher and student interact it helps clarify the thinking behind applying this concept.
Instructional Video
Loyola University Chicago

Math Flix: Topology Mazes as Simple Closed Curved

For Students 3rd - 8th
This QuickTime movie offers a great explanation of the subject of simple closed curves in topology using mazes. Topological equivalents are also discussed. As you watch and listen to the teacher and student interact it helps clarify the...
Instructional Video
Loyola University Chicago

Math Flix: Introduction to Topology

For Students Pre-K - 1st Standards
This QuickTime movie offers a great introduction to the subject of topology. As you watch and listen to the teacher and student interact it helps clarify the thinking behind applying this concept.
Instructional Video
Loyola University Chicago

Math Flix: Complementary/supplementary Angle Computation

For Students 4th - 8th Standards
This QuickTime movie provides an opportunity to learn about computing the total degrees for complementary and supplementary angles. As you watch and listen to the teacher and student interact it helps clarify the thinking behind applying...
Instructional Video
Khan Academy

Khan Academy: Long Live Tau: Pi Is (Still) Wrong.

For Students 9th - 10th
Please excuse the simple math and spelling errors. You shouldn't believe anything I say without double-checking even at the best of times. Go here: http://tauday.com/ and here: http://www.math.utah.edu/~palais/pi.html Me: http://vihart.com

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