Khan Academy: 3. Calculate Intersection Point

How many different ways can three planes intersect? The interactive provides three movable planes. Pupils manipulate the planes to determine the number of solutions possible based upon their intersections.

Video shows using a spreadsheet to demonstrate calculating the coefficient of determination or r-squared. Also explains how to interpret the value of r-squared. [9:45]

Points on the control arm: Let's start with a shape with four control points, AAAA, BBBB, CCCC and DDDD, then use subdivision with weights (1,1)(1, 1)(1,1)left parenthesis, 1, comma, 1, right parenthesis.

This lesson provides examples that illustrate equations for points in subdivision.

Sal solves a word problem about the angles of a given triangle by modeling the given information as a system of three equations and variables.

An instructional video that presents the solution to an IIT JEE problem about the intersection points of a circle and a hyperbola. Students must find the intersection points and then determine the equation for a circle whose diameter is...

The last video in a three-part series on the Binomial Theorem from the Khan Academy. This segment illustrates how the Binomial Theorem is directly related to combinatorics using (a + b)^3 as an example. Students can clearly see how a...

The third video in the Khan Academy's series on Polar Coordinates. This final segment goes through several more examples of converting Cartesian equations to polar equations and vice versa. This video is also included in the Trigonometry...

A continuation of the Khan Academy video lesson series on identifying conic sections. This segment goes through examples that cover identifying and graphing both a circle and a parabola. [11:34]

Another segment in the series on compound interest and the number e from the Khan Academy. This video begins to derive the formula for interest compounded continuously (A=Pe^rt). Limits are employed to show that the limit of the interest...