Skip to Main Content
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
a new mystery shape
260 Chapter 6
Landowners, unite
Just when all the lawns seemed under control, Edward ran into a little snag.
He turned up at a customer’s house to find that he has been buying up
adjacent land. The neat rectangular lawn that Edward had been mowing
for months has been transformed into…something else.
Before:
After:
It’s going to take longer to mow and edge this new lawn, and
Edward needs a hand working out the charges. He took some rough
measurements and gave them to you over the phone, but he didn’t
get all the sides. So what do we do with a lawn like this?
28 meters
24 meters
24 meters
28 meters
53 meters
The lawn was originally a tidy
rectangle. Super easy to mow,
and calculating charges was a
snap!
The lawn is definitely
larger. It still has four
sides, but it’s not a shape
we’ve seen before.
you are here 4 261
quadrilaterals
Check out the shape of the new lawn. How do you think we could
go about finding the area of a shape like this?
Really?
We can’t do exactly the same thing we
did before because we don’t have all the
measurements we’d need. Let’s take a closer
look.
You’ve GOT to be kidding! This
is way too easy, we’ve done all this
before. All we need to do is split the
shape into a rectangle and two triangles,
and find the total area. Duh!
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Start your free trial

You might also like

Make: Geometry

Make: Geometry

Joan Horvath, Rich Cameron
Classical Geometry: Euclidean, Transformational, Inversive, and Projective

Classical Geometry: Euclidean, Transformational, Inversive, and Projective

I. E. Leonard, J. E. Lewis, A. C. F. Liu, G. W. Tokarsky

Publisher Resources

ISBN: 9780596808365Errata Page