Projective geometry | Euclidean plane geometry
In geometry, the nine-point conic of a complete quadrangle is a conic that passes through the three diagonal points and the six midpoints of sides of the complete quadrangle. The nine-point conic was described by Maxime Bôcher in 1892. The better-known nine-point circle is an instance of Bôcher's conic. The nine-point hyperbola is another instance. Bôcher used the four points of the complete quadrangle as three vertices of a triangle with one independent point: Given a triangle ABC and a point P in its plane, a conic can be drawn through the following nine points:the midpoints of the sides of ABC,the midpoints of the lines joining P to the vertices, andthe points where these last named lines cut the sides of the triangle. The conic is an ellipse if P lies in the interior of ABC or in one of the regions of the plane separated from the interior by two sides of the triangle, otherwise the conic is a hyperbola. Bôcher notes that when P is the orthocenter, one obtains the nine-point circle, and when P is on the circumcircle of ABC, then the conic is an equilateral hyperbola. In 1912 Maud Minthorn showed that the nine-point conic is the locus of the center of a conic through four given points. (Wikipedia).
Decimal Notation: Ordering Decimals
This video explains how to order numbers written in decimal notation from least to greatest. http://mathispower4u.com
From playlist Introduction to Decimals
Find the Equation of the Conic with Eccentricity = 1 Focus (0, 6) and Vertex (0,0)
Please Subscribe here, thank you!!! https://goo.gl/JQ8Nys Find the Equation of the Conic with Eccentricity = 1 Focus (0, 6) and Vertex (0,0)
From playlist Conics
Comparing and arranging decimals
This is a short video tutorial on comparing and arranging decimals. For interactive applets, worksheets, and more videos go to http://www.mathvillage.info
From playlist All about decimals
The nine-point center (X5) is the center of the circle through the midpoints of a triangle: and lots more! ************************ Screenshot PDFs for my videos are available at the website http://wildegg.com. These give you a concise overview of the contents of the lectures for various
From playlist Triangle Geometry
Nine Point Circle | Proving NPC Configuration | Amazing facts! | SoME1
Special thanks to 3 Blue 1 Brown!!! …(A part of SoME1) Sorry for the incomplete end, few seconds got missed, but they weren't significantly important so chill. One more important formula regarding the ninepoint circle for those who open the description box: NA^2 + NB^2 + NC^2 + NH^2 =
From playlist Summer of Math Exposition Youtube Videos
Equation of Conic with Center (0,0) Focus (4,0) and Eccentricity = 7/5
Please Subscribe here, thank you!!! https://goo.gl/JQ8Nys Equation of Conic with Center (0,0) Focus (4,0) and Eccentricity = 7/5
From playlist Conics
Examples: Addition of Decimals
This video provides 4 examples of adding decimals with different place values. Complete video list: http://www.mathispower4u.com
From playlist Adding and Subtracting Decimals
Introduction to Conics (5 of 8: Using Eccentricity to locate of Directrices of the Ellipse)
More resources available at www.misterwootube.com
From playlist Further Work with Functions (related content)
Equation of Conic with Eccentricity = 2/3 Focus (0,-1) and Center (0,0)
Please Subscribe here, thank you!!! https://goo.gl/JQ8Nys Equation of Conic with Eccentricity = 2/3 Focus (0,-1) and Center (0,0)
From playlist Conics
Classifying Conic Sections: Conic Sections | Pre-Calculus Lesson
In this lesson we will work on how to identify the different types of conics when given an equation in standard or general form. In general form we will discuss how to find the vertex of a parabola as well as the center of an ellipse, circle and hyperbola. When we are given general form
From playlist Pc - In the classroom
Seminar on Applied Geometry and Algebra (SIAM SAGA): Bernd Sturmfels
Date: Tuesday, February 9 at 11:00am EST (5:00pm CET) Speaker: Bernd Sturmfels, MPI MiS Leipzig / UC Berkeley Title: Linear Spaces of Symmetric Matrices. Abstract: Real symmetric matrices appear ubiquitously across the mathematical sciences, and so do linear spaces of such matrices. We
From playlist Seminar on Applied Geometry and Algebra (SIAM SAGA)
Complex surfaces 3: Rational surfaces
We give an informal survey of some complex rational surfaces. We first lift a few examples: hypersurfaces of degree at most 3, and the Hirzebruch surfaces which are P1 bundles over P1. Then we discuss the surfaces obtained by blowing up points in the plane in more detail. We sketch how to
From playlist Algebraic geometry: extra topics
I introduce the 4 conic sections, explain the basic structure of Ellipses & Circles, and finish by working through three graphing examples after putting these equations in standard form. Check out http://www.ProfRobBob.com, there you will find my lessons organized by class/subject and the
From playlist PreCalculus
Eccentricity and directrix of the conic section (KristaKingMath)
► My Polar & Parametric course: https://www.kristakingmath.com/polar-and-parametric-course Learn how to use the polar equation of a conic section to identify the conic as a parabola, an ellipse, or a hyperbola, find eccentricity and the equation of the directrix, and the sketch the conic.
From playlist Polar & Parametric
Graphing Conic Sections Part 1: Circles
We've graphed tons of lines, but now it's time to graph more complex figures. Conic sections, which are literally cross-sections of a cone, will be important to be able to graph. Let's learn what these conic sections are, and learn how to graph them one by one, starting with circles. Watc
From playlist Algebra 1 & 2
Ex: Find the Intercepts and Foci of a Hyperbola Given a Polar Equation
This video explains how to find the x and y intercepts and the foci of a hyperbola given as a polar equation. Site: http://mathispower4u.com
From playlist Graphing Polar Equations
Tropical Geometry - Lecture 1 - Plane Curves | Bernd Sturmfels
Twelve lectures on Tropical Geometry by Bernd Sturmfels (Max Planck Institute for Mathematics in the Sciences | Leipzig, Germany) We recommend supplementing these lectures by reading the book "Introduction to Tropical Geometry" (Maclagan, Sturmfels - 2015 - American Mathematical Society)
From playlist Twelve Lectures on Tropical Geometry by Bernd Sturmfels
Equation of the Conic given the Length of the Major Axis, Eccentricity, and Center
Please Subscribe here, thank you!!! https://goo.gl/JQ8Nys Equation of the Conic given the Length of the Major Axis, Eccentricity, and Center
From playlist Conics
Ciro Ciliberto, Enumeration in geometry - 15 Novembre 2017
https://www.sns.it/eventi/enumeration-geometry Colloqui della Classe di Scienze Ciro Ciliberto, Università di Roma “Tor Vergata” Enumeration in geometry Abstract: Enumeration of geometric objects verifying some specific properties is an old and venerable subject. In this talk I will
From playlist Colloqui della Classe di Scienze