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Head First 2D Geometry by Dawn Griffiths, Stray

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Kwik-klik doesn’t make a “six and a
bit” size p
i
ece so y
ou can onl
y build
jumps wi
th whole number lengths.
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
Mor
e than a
r
ight angle
Not by much but
only exactly 90º is
a right angle, 91.2º
doesn’t cut it!
Less than a
r
ight 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-r
ight tr
iangles
ar
e ca
lled OBLIQU
E
triangles.
you are here 4 115

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