Straightedge

What's a straightedge? Geometry Terms and Definitions

An introduction to a very important geometric tool - the straightedge. It's not the same as a ruler! Geometer: Louise McCartney Artwork: Kelly Vivanco Director: Michael Harrison Written & Produced by Kimberly Hatch Harrison and Michael Harrison ♦♦♦♦♦♦♦♦♦♦ Ways to support our channel:

From playlist Socratica: The Geometry Glossary Series

Cycloid

#Cycloid: A curve traced by a point on a circle rolling in a straight line. (A preview of this Sunday's video.)

From playlist Miscellaneous

Perpendicular Lines, Slope, Rays, and Segments | Geometry

This geometry video tutorial provides a basic introduction into perpendicular lines, slope, rays, line segments and right angles. Perpendicular lines have slopes that are negative reciprocals of each other. Perpendicular Lines, Rays, and Line Segments intersect each other at right angles

From playlist Geometry Video Playlist

Duplicating a Line Segment

Watch more videos on http://www.brightstorm.com/math/geometry SUBSCRIBE FOR All OUR VIDEOS! https://www.youtube.com/subscription_center?add_user=brightstorm2 VISIT BRIGHTSTORM.com FOR TONS OF VIDEO TUTORIALS AND OTHER FEATURES! http://www.brightstorm.com/ LET'S CONNECT! Facebook ► https

From playlist Geometry

Linear Desface

Here we show a quick way to set up a face in desmos using domain and range restrictions along with sliders. @shaunteaches

From playlist desmos

To construct a PENTAGON with ruler (straightedge) and compass

Geometrical construction of a pentagon with Euclidean Tools Follow me: http://www.twitter.com/dantecardoso

From playlist Math

Angle and Segment Bisector Constructions

I give you the steps and demonstrations on how to construct a perpendicular bisector of a segment and an angle bisector with a compass and a straight edge. Find free review test, useful notes and more at http://www.mathplane.com If you'd like to make a donation to support my efforts look f

From playlist Geometry

Twelve Ways to Trisect an Angle – David Richeson

We all know that it is impossible to trisect an angle, right? It is impossible using only a compass and straightedge. But it is possible if we change the rules. For G4G12 we present a dozen ways to trisect an angle.

From playlist G4G12 Videos

Alex Kontorovich - Numbers and Fractals [2017]

It is a very good time to be a mathematician. This millennium, while only a teenager, has already seen spectacular breakthroughs on problems like the Poincar´e Conjecture (solved by Grisha Perelman, who declined both a Fields Medal and a million dollar Clay Prize) and the near-resolution o

From playlist Mathematics

Constructing a tangent line using compass and straightedge | Geometry | Khan Academy

Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/geometry/geometric-constructions/constructing-tangents/e/constructions_3?utm_source=YT&utm_medium=Desc&utm_campaign=Geometry Watch the next lesson: https://www.khanacademy.org/math/geometry/geome

From playlist High School Geometry | High School Math | Khan Academy

7A_1 Linear Algebra Definitons

Definitions used in linear algebra

From playlist Linear Algebra

Dividing a Line into Seven Equal Segments (visual proof; straightedge and compass)

In a previous video, I showed how to decompose a circle into seven pieces each with the same area (https://youtu.be/KhfZK5IIK9E). Many people asked about a key step in that construction that I didn't include. So here I have animated the construction of dividing a line into 7 equal parts us

From playlist Geometric Constructions

EngageNY Grade 4 Module 4 Lesson 1

EngageNY/Eureka Math Grade 4 Module 4 Lesson 1 For more videos, please visit http://bit.ly/engageportal PLEASE leave a message if a video has a technical difficulty (audio separating from the video). Occasionally, Explain Everything will do that, requiring me to re-render the video.

From playlist EngageNY Grade 4 Module 4

Amazing railway track laying machine

I want one of these.

From playlist Science

Compass and straightedge - the regular Heptadecagon

One of the oldest and best-known topics in the history of mathematics are compass and straightedge (or compass and ruler) constructions. I will not illustrate them here, and neither will I explain why it's so remarkable that the regular heptadecagon, the 17 equal-sided polygon, actually CA

From playlist Philosophy

copying a line segment - geometry constructions

This video teaches students how to copy a line segment. In particular, this video will show students how to use a compass and straightedge to copy a line segment. This video is appropriate for a student taking a course in Geometry. In particular, students preparing for the NY Geometry R

From playlist Geometry

Constructing a perpendicular line using a compass and straightedge | Geometry | Khan Academy

Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/geometry/geometric-constructions/geo-bisectors/e/constructions_1?utm_source=YT&utm_medium=Desc&utm_campaign=Geometry Watch the next lesson: https://www.khanacademy.org/math/geometry/geometric-con

From playlist High School Geometry | High School Math | Khan Academy

ROUND FRESNEL LENS ON A STICK

http://www.greenpowerscience.com/ DEMONSTRATION MODEL OF A FRESNEL LENS PERFECT FOR FAST DEMOS

From playlist FRESNEL LENS