Name: Doodling in Math Class: Triangle Party
Uploaded: 2020-03-30T03:05:12.000Z
Duration: 4 min 25 s
Description: Thousands of YouTube videos with English-Chinese subtitles! Now you can learn to understand native speakers, expand your vocabulary, and improve your pronunciation...

and-- triangles, triangles, triangles-- I don't know.

The teacher keeps saying words, and you're

supposed to be doing something with trigons,

But you're bored and-- triangles, triangles,

Sure you could draw your triangles separately,

They're happiest when snuggled up together

Sometimes they get together and do these triangle congo lines.

If you keep adding new triangles on the same side,

Or you can alternate and it goes pretty straight.

In fact, since all the sides of the triangle

of some previous straight line, then this whole line

would have to be straight if these were actually triangles.

Since it's not, it's proof that these aren't quite triangles.

Maybe they've been partying a little too hard,

going on about types of trigons, and you're

of triangles, which you already know all about.

There are fat triangles, and pointy triangles,

slice triangles which are a kind of pointy triangle

but are symmetric like a slice of cheese or cake.

Super pointy triangles are fun to stack into triangle stacks.

You can put all the points facing one direction,

So it's good to put some facing the other direction before you

You'll notice pretty quickly, that the skinnier the triangle,

have to navigate your triangle stack around your notes.

In which case you can even alternate back and forth

as long as you make the triangles point towards where

is that there's really only one part of the triangle that's

important, as far as the stack is concerned.

The other two angles can be fat and skinny, or skinny and fat,

and it doesn't change the rest of the stack.

because then you'll get two skinny points,

and which side should you continue to stack on?

Also, instead of thinking fat and skinny,

that won't set off your teacher's mind reading

So you pick two words off the board, obtuse and acute,

which by sheer coincidence I'm sure, just

happen to mean fat angle and skinny angle.

Of course, those are also kinds of triangles.

Which doesn't make much sense, because the obtuser one

angle of a triangle is, the more acute the other two get.

with the same perimeter, it has more area,

And then, can you still call an obtuse equilateral

triangle a cheese or cake-slice triangle,

because these look more like [INAUDIBLE].

Point is, triangle terminology is tricky,

but at least you're not paying attention to the stuff

the teacher is saying about trigonometric functions.

You'd rather think about the functions of triangles.

There are sines, and cosines, but enough of this tangent.

The thing to pay attention to is what affects your triangle how.

If you start drawing the next triangle on your triangle

stack this way, by this point, you already

know what the full triangle would have to be.

Because you just continue this edge until it

meets this invisible line, and then fill the rest in.

In fact, you can make an entire triangle stack just

by piling on triangle parts and adding the points later

you can see that it's never going to close, no matter

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Doodling in Math Class: Triangle Party

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pretend

guarantee

straight