Points after rotation | Transformations | Geometry | Khan Academy

Points after rotation

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:

[Sara-slwz]

I'm still confused and I have a math test tomorrow 😔

[_iamraee_]

anyone here from 2020 bc we have online school now🥴.

[danielaguilar-lopez]

you made this much more complicated than it actually is.

[prankstermanparkour]

This made my math 10000 times easier, mom told me that "math builds on it's self". It doesn't if it just jumps to rotational transformation from 6th grade graphing

[badangelray]

Sorry but am confused, am not getting this can u kindly use another example

[milkvevo-zlos]

this is easy just have quiz next week, thanks

[thainguyen]

what is you have to rotate it 50 degrees?

[graysonwilkins]

This looks like a lot of work for one shape

[nottrashplazyt]

Thanks, I now understand the “L” thing my teacher has been talking about .

[Ela-nuoq]

i have homework due in a like 2 hours. i have no idea how to do this. i’m trying to keep it together

[crddct]

I was trying a problem using this method, but for some reason I got a triangle that was smaller than its original one because there wasn't enough space on the graph. Can anyone tell me why this is? The points on the triangle are (-7. -3), (-2, 1), and (-5, 4), and you have to rotate the triangle 90 degrees. Am I doing anything wrong?

[AvinashJuriani]

well that gives a pole star much better than a triangle

[subashinimrs]

Why right triangles when u can just make a "L" at the origin

[yassenwalid]

I thought this was an art video after seeing the first graph at the end...

[paulpett]

thanks for this I really needed this i have a test next week

[rikardtapia]

I don't understand is, -90 degrees counterclockwise or just clockwise

[bakihanma]

Sal do a video on clockwise and counter clockwise !!!

[toffeedisc]

I’m here because we’re having a math quiz tomorrow

[thelastharv]

Actually the explanation isn't that clear its missing key information

[yughaasahmed]

I thought he taught maths, not drawings😂