Equations of parallel and perpendicular lines | Analytic geometry | Geometry | Khan Academy
ฝัง
- เผยแพร่เมื่อ 5 เม.ย. 2010
- Equations of Parallel and Perpendicular Lines
Practice this lesson yourself on KhanAcademy.org right now:
www.khanacademy.org/math/geom...
Watch the next lesson: www.khanacademy.org/math/geom...
Missed the previous lesson?
www.khanacademy.org/math/geom...
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.
About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content.
For free. For everyone. Forever. #YouCanLearnAnything
Subscribe to Khan Academy’s Geometry channel:
/ channel
Subscribe to Khan Academy: th-cam.com/users/subscription_...
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”
wadha khoory your point?
em oa it’s basically like an insult to the teacher, and she probably won’t like what you said/disregard you
@@temu250 _your_ point?
@@locarre em oa wrote that comment 10months ago.Why u all still care🤣
@@kingma4987 bye✋
I swear whenever you write like that, the finished product is just the most satisfying thing
Yes that's the point of math,a bunch of things u did and it makes sense but not random numbers
My savior in math class....
it’s crazy to think you graduated by now
@@warner5380 you still here or. xD
@@tsenpai8549 always here homie
@@warner5380 SHEESH did you graduate?
@@tsenpai8549 nah not yet
10 years later and this video is still helping students like me great job man we all love you
I've been having issues with this, this video made my issues go away.
how tf is this 12 time files
@@mrcactus245its 13 now
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.
This was extremely important for my math test, thank-you so much.
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 :/
@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
When ur teaches right assigns this cuz she on a vacation but the whole world is kn lockdown :/
Thank you SO much, my math teacher hardly explains anything properly.
Fax
@@carlitojaunito2269 Ya so True
I’m just imagining your math teacher seeing this comment 😂
Same
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
This video will forever stay in my head my teacher always showed this to us every year so thankyou ig 😭 🤙
Helps me a lot!!! Thanks
Thank you so much my teacher I swear didn't explain it ever and we have a test on it today
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)
U are the best teacher ever!!
This made me not so anxious about school. Thank you.
Isn't it suppose to be y2-y1? It looks like you're doing y1-y2. You have me confuse on this.
***** it is not the same thing
You are correct
Dana Scully it's the same if you do y1-y2 over x1-x2. He explains it in another video, I think
+Rachel Zhu are you Chinese
@@rachelzhu3077 Its not the same, I tried it on the second example, the pair (0, -3)(-2,5) ended up with -1/5 instead of -4.
Thanks now I will pass my test
did you pass
Did you pass
Did you pass?
You're like my god right now because you are literally helping me get through math 10. Thank you!
And now you've graduated. Congratulations!
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
I always forget how to solve the last question then I repeat the video again😂😂
Same
this helped me more than my 8th grade math teacher
I like how sense is made here
Why do teachers over complicate things when this is what I could be doing, I knew i was smart all along
Thanks!
doing a level maths thanks khan
thank you lord khan
Thank you so much!
Thank you kind sir
thank you very much
same slope! gotchya.
thank you bro...you help alot to save my time❤
TRULY AMAZING AND HELPFUL THANK YOU DUDE :)
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
How do u make it so easy
Omg you helped me soo much. Thank you!
Are u active still...
Perpendicular learning
ONE REQUEST everything is perfectly perfect the thing is kindly go little quick nvm?:)
#WOW...DONE
Sir can u please solve this:
If MC a line is the perpendicular bisector of AB also a line which
Has coordinates A=(0,4), B=(10,8) and C=(k,1). And I already found M which is the midpoint of AB and that is (5,6).
Thus find k.
K=3
Tq sir it's very helpful me... And I have one problem the above problem having two Co ordinates.. But I confused on if these r three coordinate like A(1,1,1) and B(2,3) and c(3,5.-2) D(-1,1) how can I find out slopes....
Oh your probably dealing with 3D graphs with the Z coordinate
nine teeeee dagreez! gotchya
I'm confused on how you got 6/9 to 2/3
Thanks😭😜
How would you prove parallel lines y intercept ?
you can do better...!!! but good job its amazing plz make a lesson about slope_intercept form!!!
thank you for your teach we all really like it you are so helpful:)
Great Explanation and elaboration 🤩
Its so hard to think all the people who watched this video many years ago are graduated and I’m seeing it now
In the first problem u didn’t follow the slope formula but u did in the second just wondering why u changed
well nice not bad
What would I do if I would have to find the slope and parallel line of x = -5??
2:58 for the second line can you pick any point to find the intercept?
Yes
very nouice make me haappyyyy
Last!
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).
i liked the other green
what if i have 2 points and one end point and i have to find the other point. I'm a struggling geometry student help.....
I can’t believe I’m the only one commenting on how he says add 8 to both side’s rewrote the equation with 8 only added to one side and says problem solved and ends the video. “Help me plz”
does it matter whether you put one of the Y(s) before the other when minusing
Not necessarily but in some it does, but for the most part if you use Y1-Y2 or the opposite Y2-Y1 it won't matter
are you going y1-y2 over x1-x2 or am i just hearing things
How you can solve in perpendicular if one number is missing in one coordinates.
When finding the slope does it matter which set of parentheses you use as (x1,y1) and (x2,y2)?
it can be y1-y2 over x1-x2 or y2-y1 over x2-x1 it doesn’t matter
Sam Villa thanks
My teacher don’t communicate so I have to watch videos.
isnt it suppose to be (y2-y1)/(x2-x1)?
doesn't matter how you do it
@SUGAkemi Chu same outcome
he uploaded this on my 15'th birthday!
STFU
GAMERKIDCHANNEL :(
VerryLongName no I didn't bitch
+GAMERKIDCHANNEL
lol...
We're trying to pass classes kid...
go back to watching PewDiePie
kids fight like sissies on a maths video: an epic tale
Sal is op
hi people in mr davis geometry :)
No dislikes! Woo!
shouldnt it be the opposite way round in 2:50 because y2-y1 divided by x2 - x1 would equal the gradient
It doesnt matter as long as you do them in the same order, youre going go get the same gradient. you can do y1-y2/x1-x2 but not y2-y1/x1-x2
I still don't really understand. Also, what program do you use?
Newest comment(|:
King Mathew not anymore buddy
I'm newest now
Emre John Nebioglu nah
It's 6 years ago
I got a rhombus and I should find the equation of one side. 3 remaining sides' equations are given. Please help me.
too late for that!
can you help me out with a problem like this; Write the slope-intercept form of an equation for the line that passes through (-8, -1) and is parallel to the graph of y=-5/8x+2
PLEASE HELP
lol.
how to solve if the equation is y=x=1 y=x+5 ??
They are parallel line because the slope is the same in both lines: 1
Will these videos ever become outdated?
hey I'm confused. change of x and y is (y2-y1) ,(x2-x1) but why are you using (y1-y2) ,(x1-x2) . enlighten me.
+Angelo Bacayo both ways work! you get the same exact answer either way you use it (:
Angelo Bacayo no ur wrong u take the absolute value
@@reeseelizabeth2889 No you do not.
@@sadwdasdwa5593 Yes you do
@@khattakjarir3399 one gives negative and the other is postive.
Last
Thanks! But one the first one, why did you do y1-y2 and x1-x2 instead of y2-y1 and x2-x1?
ShadowDemonOffical time it is the same thing but u take the absolute value
Logan Moy oh okay thanks bro
the slope formula is wrong its y2 - y1 divide by x2-x1
It helps me so much.Best video ever.Thank you so much!!!
wait a minute, he says 4- - 8 but in the formula its x2 - x1 (in the first example)
I mean points -8 and 0 is second and 4 -3 is first
so why he did the oppiste?
Leeeeel
i must be the stupidest person alive becuase i didn't get it
Did you understand it now ? It's been 10 years already
same
i did the opposite of what you did in the third problem and i got the answer -2/-3 for the first slope , is that ok
Provisidiya no. It would be positive
Lost me at 5:50 :').. You did Y - Y2.. Isn't it supposed to be the other way round... Y2 - Y🤔
Yeah its y2-y
-3-0=??
What application is he using?
App
Isn't it y2-y1/x2-x1?. Plz explain I'm confused
grr i h8 math
How might one write the equations in y-intercept form and standard form? Lmfao I have an exam in 40 minutes
First
I am has ununderstopndment help I
is this alevel or GCSE??
what level is this
grade 10
grade 9 as well ;0
oh poor you! :(
k but this is over 10 YEARS old....
you confuse me cause i dont know which way to start
Umm am I the only one confused? Does it looks as though he's doing y1-y2?
doesnt matter as long as you do them in the same order, youre going go get the same gradient. you can do y1-y2/x1-x2 but not y2-y1/x1-x2
Y2-Y1÷X2-X1 u didn't follow the formula
aligato osayimas sensei. 🐱👤