Equations of parallel and perpendicular lines | Analytic geometry | Geometry | Khan Academy

Equations of Parallel and Perpendicular Lines

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[james_]

I swear whenever you write like that, the finished product is just the most satisfying thing

[turtlegrabber]

10 years later and this video is still helping students like me great job man we all love you

[wadhakhoory]

Imagine your teacher scrolling through the comments and passes by your comment, were you said “You teach better than my teacher!! ” or “I understood this lesson in 9 minutes, while I struggle weeks understanding a lesson in school”

[Gambinoscuzynot]

Man, you are a lifesaver. Right now my math teacher is making everyone teach the class a chapter and i got paired up with the kid who isn't exactly the brightest lightbulb. Anyways, thanks.

[danascully]

Isn't it suppose to be y2-y1? It looks like you're doing y1-y2. You have me confuse on this.

[khanacademy]

@SASMOUNTAINTROOPER did that on purpose to show that it doesn't matter as long as you keep the same order for the x's and the y's

[AnushkaManoj-todo]

This was extremely important for my math test, thank-you so much.

[atlasemerson]

Dont forget to add that of the two lines are parallel, then make sure the y intercepts are not the same. Because if the have the same slope and y intercept, they are the same number and not parallel

[CatUnderpowered]

This video will forever stay in my head my teacher always showed this to us every year so thankyou ig 😭 🤙

[idek]

I'm definitely not cut out for school with my attention span of 2 seconds and a brain that could be bested by a toddlers :/

[fearthearchitect]

Thank you SO much, my math teacher hardly explains anything properly.

[sarahcollins]

You're like my god right now because you are literally helping me get through math 10. Thank you!

[arrowpaw]

Thank you so much my teacher I swear didn't explain it ever and we have a test on it today

[hyperthreaded]

Very good lessons. Found them via today's Slashdot article about Bill Gates' kids :P You could've explicitly shown at some point that m2=-1/m1 are indeed inverses of *each other*, i.e. that, in fact, m2=-1/m1 is a "cyclic" relation, so with m2=-1/m1, m1=-1/m2 is also true.

(or maybe you did that already in previous lessons, or left it as an exercise to the listener)

[bonzosmontreux]

This made me not so anxious about school. Thank you.

[bunnyfun]

im in 7th grade and i have to learn algebra and we go over these thing in like one day and each day is a new lesson and then there's a test, but i am very confuzzled even tho i kind of understand, thanks a lot i understand now

[imranibrahimi]

When ur teaches right assigns this cuz she on a vacation but the whole world is kn lockdown :/

[KornyKornzz]

If switching up the order of y, will the answer change the when identifying the slope? I know its to find the absolute value. Just threw me off when he changed the order of y. (absolute value of a number is never negative).

[Nathanielrig]

In the first problem u didn’t follow the slope formula but u did in the second just wondering why u changed

[wooowoakkdmdj]

for the end of the last question, there was a way easier way which is substituting the y with 8 and x with 2, its less complicated