November 2009
Beginner
368 pages
8h 55m
English
Content preview from Head First 2D Geometry
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78 Chapter 2
bring in the band
All the arrows are the same.
The square part is half the
length of the arrow head part.
Triangle sides are the same.
The darker set of arrows are
3/4 size.
Liz is back with a special request
The great thing about happy customers is that they just keep
coming back. Impressed by the effort you put in to getting her
phone just right, Liz is trusting you with another great gig.
Hey! Everyone thinks my phone
looks great. Can you do a totally
custom design on my brother’s
iPod of his band’s logo?
The sketch is pretty…er…sketchy.
Drawn on the back of a flyer by
the drummer.
An “arrow” is
one of these.
you are here 4 79
similarity and congruence
Before you start sketching the design, what lengths and angles
do you need to find? Could you use similarity to save yourself
some time and effort?
the arrows are similar
80 Chapter 2
All the arrows are the same.
The square part is half the
length of the arrow head part.
Triangle sides are the same.
The darker set of arrows are
3/4 size.
Although there aren’t any length or angle markings on the diagram,
the instructions give us plenty of clues—and there’s a ton of
similarity going on here.
The diagram is made up of six
similar ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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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.