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## How to find the focus and directrix of a parabola

03:43 5.1 MB MB 354,881

Learn how to graph a parabola in standard form when the vertex is not at the origin. We will learn how to graph parabola's with horizontal and...

## Precalculus Find focus, directrix , focal diameter of parabola y^2=32x

03:44 5.13 MB MB 810

Find focus, directrix , focal diameter of parabola y^2=32x

## Latera Recta and the Focal Diameter for Conics

15:27 21.22 MB MB 34

The latera recta (singular: latus rectum) for parabolas, ellipses, and hyperbolas, and their length, the focal diameter. This is pretty easy...

## power=-2.5 diopter what is the focal length

00:51 1.17 MB MB 45,150

## Parabolas in focal diameter form 3 quick examples, shifted

05:00 6.87 MB MB 4,358

x^2 = 4py up or down y^2 = 4px right or left Vertices shifted, not at origin focal diameter = latus rectum length = 4p p = distance from...

## Parabolas in focal diameter form 4 quick examples

05:24 7.42 MB MB 18,085

x^2 = 4py up or down y^2 = 4px right or left Vertices at origin focal diameter = latus rectum length = 4p p = distance from vertex to...

## Thin Lens Equation Converging and Dverging Lens Ray Diagram & Sign Conventions

34:16 47.06 MB MB 553,788

This physics tutorial shows you how to use the thin lens equation / formula to calculate variables such as the image height and image distance...

## Conic Sections - Circles, Ellipses, Parabolas, Hyperbola - How To Graph & Write In Standard Form

19:02 26.14 MB MB 1,845,719

This video tutorial shows you how to graph conic sections such as circles, ellipses, parabolas, and hyperbolas and how to write it in standard...

## Writing the equation of a parabola given focus and directrix

04:00 5.49 MB MB 210,950

Learn how to write the equation of a parabola given the focus and the directrix. A parabola is the shape of the graph of a quadratic equation....

## 7.3 Parabolas

24:15 33.3 MB MB 53

This project was created with Explain Everything™ Interactive Whiteboard for iPad. 00:00 Intro - Defining a Parabola in Terms of Distance...