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Head First 2D Geometry by Dawn Griffiths, Stray

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Ha
nd dr
aw the
some
The designer noted all of the details
similarity and congruence
The designer wrote a bunch of notes around his drawing. He
seems to have filled out all the line lengths, but only included
a few of the angles?!?
Mou
ntain
tip tria
ngle
is the same
shape
tria
ngle as
the whole
mou
ntain
The two mou
ntain triangles
are the same shape, but
120
56
6060
37.5
30
40
48
40
6
60
41º 53º
This corner a
lso
90
sun and r
ays
Uh oh! Your first day on the job and you’ve
got a busted design! I can’t believe the
designer stuck it in the book unfinished like
that. I’d get your customer to choose another
one....
r
esca
led/flipped
It certainly looks like there are a lot of angles missing.
Has the designer left you any hints about what the angles
he hasn’t written might be?
you are here 4 53

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