This geometry lesson explains how angles are formed when a transversal intersects parallel lines.
- Author:
- Khan, Salman
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This geometry lesson is Part 1 of 2 lessons that give a proof of Heron's Formula.
- Author:
- Khan, Salman
This geometry lesson is Part 2 of the Proof of Heron's Formula, showing that the expression derived in Part 1 is identical to Heron's Formula.
- Author:
- Khan, Salman
This geometry lesson is an introduction to the Pythagorean Theorem and shows how to calculate the length of the hypotenuse of a right triangle.
- Author:
- Khan, Salman
This geometry lesson gives more practice exercises using the Pythagorean Theorem and introduces 45-45-90 triangles.
- Author:
- Khan, Salman
This geometry lesson provides the proof that the diagonals of a rhombus are perpendicular bisectors of each other.
- Author:
- Khan, Salman
This geometry lesson provides a proof that a triangle inscribed in a circle and having the circle's diameter as one side is right triangle.
- Author:
- Khan, Salman
http://www.khanacademy.org/exercise/similar_triangles_1This geometry lesson introduces the concept of similar triangles and how to determine alternate interior angles.https://www.khanacademy.org/math/geometry/similarity/old_school_similarity/v/similar-triangles
- Author:
- Khan, Salman
This geometry lesson continues the discussion of similar triangles and the use of ratios to determine lengths of corresponding sides.
- Author:
- Khan, Salman
This geometry lesson discusses how to calculate the volume of triangular prisms and cubes.
- Author:
- Khan, Salman
Using parallel lines, transversals, and some identified angle measurements, Salman Khan asks students to determine missing measurements for corresponding and supplementary angles in an Angle Game.
- Author:
- Khan, Salman
Salman Khan presents more angle game problems for students to solve.
- Author:
- Khan, Salman
This geometry lesson provides a quick review of triangle medians and shows that the centroid is always 2/3 of the way along every median.
- Author:
- Khan, Salman
This geometry lesson provides the proof that the centroid is 2/3 of the way along every median of a triangle.
- Author:
- Khan, Salman
This course is a continuation of MA001: Beginning Algebra, and will focus on compound inequalities, systems of linear equations, radicals, rational exponents, quadratic equations and techniques used to solve these equations, and finally, general functions and graphs with an emphasis on the exponential and logarithmic functions.
Precalculus I is designed to prepare you for Precalculus II, Calculus, Physics, and higher math and science courses. In this course, the main focus is on five types of functions: linear, polynomial, rational, exponential, and logarithmic. In accompaniment with these functions, you will learn how to solve equations and inequalities, graph, find domains and ranges, combine functions, and solve a multitude of real-world applications.
This lesson presents 2 more examples of solving equations using the quadratic equation.
- Author:
- Khan, Salman
This lesson continues a demonstration of how to interpret the language in percent problems in order to set up the problem correctly.
- Author:
- Khan, Salman
This course is designed to equip the student with the basic academic, professional, and personal skills needed in college. Of course, some of the skills this course presents may take a lifetime to master! Upon successful completion of this course, the student will be able to: clarify and state your individual educational goals, and formulate specific plans to work towards the goals; design and implement a personal time management plan; identify your preferred learning style; describe and employ critical thinking and creative thinking skills; adequately describe effective listening, note taking, memory retention, and writing skills, and methods for improving these skills; identify and accurately judge the credibility of websites; describe and use different methods of exam preparation; explain test anxiety and list strategies for reducing it; describe the interview process and strategies for successful interviewing; create a resume and a cover letter. This free course may be completed online at any time. It has been developed through a partnership with the Washington State Board for Community and Technical Colleges; the Saylor Foundation has modified some WSBCTC materials. (Try College 101)