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Head First 2D Geometry
book

Head First 2D Geometry

by Stray (Lindsey Fallow), Dawn Griffiths
November 2009
Beginner content levelBeginner
368 pages
8h 55m
English
O'Reilly Media, Inc.
Content preview from Head First 2D Geometry
you are here 4 287
regular polygons
Work the formula for circle area backward to get the butt count
for the circle shaped hot tub.
Is 19.6 butts a lot or a little?
One number on its own isn’t enough to choose a hot tub—
you want the MOST possible butt-space for your 6 square
meters of area. You need to tackle the other hot tubs shapes
to find out if they’re better or worse than the square tub.
Q:
Half a meter per butt? Really?
A: OK, so we all know that butt-size is one of life’s interesting
variables. Obviously not all butts are the same size, but in this
problem that’s not too important. Even if you had a bunch of people
with more generously proportioned butts, you’d still fit more into the
biggest perimeter, so it’s still a useful comparison.
Q:
19 butts or 19.6 butts? I’ve never met anyone with 0.6 of
a butt.
A: That’s true, you’d really round down to 19. Only whole butts
can get in the tub (unless you count a really skinny one as a 0.6).
That 0.6 gives a little extra room to the 19 folk in there though, so it’s
worth keeping those decimals in case we end up choosing between
two tubs which both have butt counts between 19 and 20.
Reviewing isn’t cheating! Circle
area formulas: page 234.
6m
2
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Publisher Resources

ISBN: 9780596808365Errata Page