Intro to lines, line segments, and rays | Geometry | Khan Academy

Let's get familiar with the difference between lines, line segments, and rays. Hint: a ray is somewhere between a line and a line segment!

Missed the previous lesson?

Geometry on Khan Academy: We are surrounded by space. And that space contains lots of things. And these things have shapes. In geometry we are concerned with the nature of these shapes, how we define them, and what they teach us about the world at large--from math to architecture to biology to astronomy (and everything in between). Learning geometry is about more than just taking your medicine ("It's good for you!"), it's at the core of everything that exists--including you. Having said all that, some of the specific topics we'll cover include angles, intersecting lines, right triangles, perimeter, area, volume, circles, triangles, quadrilaterals, analytic geometry, and geometric constructions. Wow. That's a lot. To summarize: it's difficult to imagine any area of math that is more widely used than geometry.

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[amandagraham]

This guy is the best! THANKS KHAN ACADEMY (also dude sounds like my man Damien from EmKay)

[atvandelay]

I love Khan Academy videos it really explains a lot I now love math lessons because I understand it

[VanillaDazzle]

I definitely didn't learn this in elementary school. People really learn this in elementary?

[hannaprayer]

From a home school mom with a 3rd grader, THANKS!!!! Perfect supplement to my lesson with her. :-)

[beebosbeeberino]

that soothing voice makes learning geometry fun.

[irelatetoeverything]

Wow this helped me sooo much! Im in 4th grade and now I really know what a line, a line segment and a Ray is now. THANK YOU SO MUCH

[sofy]

2:16 when he says where did I put it was my lifesaver because its 1am and I need to study and that just kept me alive XD

[clapped_youngboy]

Dis help me a lot and dis is good for homework 📚



Like dis if you like this

[dianegonzales]

I’m being homeschooled right now and this really helps!

[vickyhuo]

A satellite go on forever in one direction, and by the way, this video taught me a lot! :)

[unknownsnem]

Great job at explaining things! I have a test on this soon this really helped me understand this alot better! Keep up the awesome work!!

[kcottonable]

Wow! I had to be patient...I’m glad I did; it was informative...and the dark message board really helped kept me focused!

[sunflowerstyles-]

Thanks for my home work for stay at home school!!! You are questionably good at writing with a cursor. 🤨🤔👍

[LifesAresort]

this takes me all the way back. back in the day. the summer of 1969

[theblazinggeeks]

This helped me in 4th grade in the pandemic

[voguekisses]

thank you so much, I am home schooled and your videos really helps me :/)

[monmon]

Thanks for helping my kids on line segmensts

[sheshraoaherkar]

Which software do you use? Amazing Teaching and Basics.

[jamilahali]

About more than three times watching it: June 2nd.2018 R'Dan 17th. 8pm

[LAnonHubbard]

Please present the mathematics for doing intersection testing for 2D and 3D line segments, and for rays with different types of objects.