don't carry around a protractor everywhere you go.

And even if you do, sometimes you

want to have only the angle you want.

Because you needed a whole bunch without all those other degrees

getting in the way.

This is the need that the angle-a-tron fulfills.

A protractor is kind of like a 180-degree angle-a-tron.

It's great at 180 degrees.

You can make your own 180-degree angle-a-tron super easily

from any piece of paper.

Even if your paper doesn't have an edge, you can just fold it.

And tada, angle-a-tron.

One extremely useful angle-a-tron

is the 90-degree angle-a-tron.

Many pieces of paper come pre-equipped with one of these.

But if they don't, you can get one

by folding a 180-degree angle-a-tron in half.

Now you can draw all sorts of rectangly things

and perpendicularities.

Following the fold-stuff-in-half method,

you can get a 45-degree angle-a-tron pretty easily.

Or a 22.5 degrees.

Or 11.25, and so on.

And you get these weird looking numbers.

But that's only because we started with something

arbitrary, like 360 degrees.

When really the numbers we're looking at

are 1/2, 1/4, 1/8, 1/16, you know 1/2 to the n.

It's not hard to fold paper into thirds either.

Might take a little evening out, then bam, 180 degrees

tuns into 60 degrees.

Good for making equilateral triangles.

Or put two together to get 120 degrees.

A very common and useful angle for when, say, bubbles meet.

If you're drawing bubbles or honeycombs or something.

Then you can start adding them together.

135 degrees is easy.

90 degrees plus 45 degrees.

Now, you can make puzzles for yourself.

Say you make a 60-degree angle-a-tron

and a 135-degree angle-a-tron.

How do you make an angle-a-tron that completes the circle?

Or if a friend gives you an angle-a-tron,

can you make the complementary or supplementary-- I forget

which is which-- angle-a-tron?

And then, let me know if this is going a little too far.

Maybe you can put an angle-a-tron

on your angle-a-tron.

And now I have a 60 degrees and another 60 degrees,

which comes over here to make another 60 degrees.

And I've got an equilateral triangle polygon-a-tron.

And just in case you thought that wasn't going too far,

why not make that into a polyhedron-a-tron?