August 2011
Beginner
256 pages
8h 15m
English
Content preview from The Manga Guide to the Universe
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232 Chapter 5 Our Ever-Expanding Universe
We have already seen that different curvatures of space cause the geometry of a trian-
gle to change (see Figure 5-5). On a flat surface, parallel lines remain parallel, meaning that
the edges of a triangle are straight and the angles of the triangle add up to 180 degrees. On
a closed (spherical) surface, parallel lines converge so that a triangle’s lines bend outward
and the angles of the triangle add up to something greater than 180 degrees. On an open
(saddle-shaped) surface, parallel lines bend apart so that a triangle’s lines bend inward and
the angles of the triangle add up to less than 180 degr ...
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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.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
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.