Head First 2D Geometry

you are here 4 115

the pythagorean theorem

Not all lengths make a right triangle

There isn’t a length that can complete Sam’s design for an 11 - 9 - ? jump and

give a perfectly vertical upright. Size 7 is too long and size 6 is too short. It

seems some lengths can make right triangles and others can’t.

91.2º

11

6

9

85.9º

11

7

9

More than a

right angle

Not by much but

only exactly 90º is

a right angle, 91.2º

doesn’t cut it!

Less than a

right angle

Whoa. So not every jump is

viable? That’s all right—let’s

just make a list of the ones that

we CAN build.

How could you create a list of jumps that can be

built from the Kwik-klik pieces?

Non-right triangles

are called OBLIQUE

triangles.

Kwik-klik doesn’t make a “six and a

bit” size piece so you can only build

jumps with whole number lengths.