November 2009
Beginner
368 pages
8h 55m
English
Content preview from Head First 2D Geometry
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44 Chapter 1
you’re promoted!
Great work—you cracked the case!
Thanks to your work uncovering the angles,
the right guy is behind bars.
You’ve mastered a whole bunch of techniques for finding
missing angles, uncovered some “sketchy” assumptions,
and discovered general rules that the CSI team can use
again and again to test out ballistics evidence. Your hard
work and talent hasn’t gone unnoticed—time to hang up
your lab coat and take a hot promotion!
Before you collect your bonus and your new CSI
badge, the chief would appreciate it if you left
the ballistics lab a cheat sheet about how you
worked out who shot Micky.
We’re really impressed with how you
unravelled the evidence—this was a tricky
one! You’ve been great in the ballistics lab and
now you’ve proved you’re ready to become our
lead CSI, working your own important cases.
The chief couldn’t be
happier with you.
CHARLIE GREEN
HF COUNTY
SHERIFF’S OFFICE
GEO180
Charlie is gonna be making a
lot of license plates....
you are here 4 45
finding missing angles
Angles in a triangle add
up to 180º
Match each technique for finding missing angles to a sketch. You can use
each technique just once, but some sketches will need more than one to
find the missing angle.
Vertical angles are equal
Parallel lines cross other
lines at the same angle ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.