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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
100 Chapter 2
your geometry toolbox
Your Geometry Toolbox
You’ve got Chapter 2
under your belt and now
you’ve added Similarity and
Congruence to your toolbox. For a
complete list of tool tips in the book,
visit www.headfirstlabs.com/geometry.
CHAPTER 2
Similar shapes have
equal angles.
Similar shapes have
the same ratios
between side lengths.
You can spot similar triangles
from two equal angles.
Actually they have three
angles that are equal, but
as soon as you spot two you
know that the third is gonna
match, too.
Congruent shapes are
similar and the same size.
Congruent shapes have
angles that are equal, just
like similar shapes, but
they’re also the same scale.
All squares and
circles are similar.
you are here 4 101
similarity and congruence
There’s some major
construction projects up ahead.
And there’s been a collision
between letters and numbers!
Letters and numbers colliding?
Oh, no! It must be ALGEBRA!
But DON’T TURN BACK!
Instead, check out our FREE (and pain free) downloadable bonus
chapter on algebra and geometry here:
http://www.headfirstlabs.com/geometry
…and find out how YOU can harness the power of algebra to solve
215 geometry problems in one go.
this is a new chapter 1
What do you think of my
new dress? It’s on sale.
algebra for geometry
bonus
Finding patterns
You’re proba ...
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Publisher Resources

ISBN: 9780596808365Errata Page