Head First 2D Geometry

you are here 4 105

the pythagorean theorem

Standard-sized-quick-assembly-what?!?

Sam’s found a supplier for giant construction kit parts. Kwik-klik makes

parts which are just like construction kit toys you might have seen or played

with when you were younger, but on a much bigger scale.

1 2 3

A piece with length

3 has four holes.

Length 1 Length 8 Length 2.5

This doesn’t

work.

The lengths are

always whole numbers.

You can change

this angle.

The bars get fixed

together with a bolt

through the holes.

So easy, anyone can do it! But Sam’s first ramp has a major problem…

Try drawing a 3cm line with

a dot at the start and the

end, as well as each cm.

The pieces have holes in them

at evenly spaced intervals.

Because there’s a hole on either end,

each piece has one more hole than

the length it represents.

The parts come in tons of sizes,

from size 1 upward, but always

as whole numbers.

You can’t have a size “two and a half ”

part.

To build stuff, you just bolt the

parts together through lined-up holes.

The pieces can pivot to any angle around the

bolt, so you can swing them into any position

you need.

We don’t count the

length of the extra

bits on the ends.