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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 4 187
triangle properties
Let’s put the drink stall at the centroid
Outside the venue would be a pretty weird place to put your drinks stall, so it’s
important to pick a center which is always interior.
The centroid also never gets pulled particularly close to one side or vertex,
whereas the incenter can end up very far from one vertex if the triangle has
sides of very different lengths.
An interesting thing about the centroid is that it’s where the triangle
balances—this means that each median splits the triangle area into two equal
halves.
Stage at this end.
Scale : 1cm = 10 meters
Using accurate construction, find the position of the centroid of
your field to the nearest meter.
Do you notice anything interesting about the distance from the
centroid to the stage?
and ruler
188 Chapter 4
find the centroid
Using accurate construction, find the position of the centroid of
your field to the nearest meter.
Do you notice anything interesting about the distance from the
centroid to the stage?
and ruler solution
50m
75m
Stage this end
Scale : 1cm = 10 meters
25m
The centroid is exactly 2/3 of the
way from the stage to the back of
the venue.
To find the centroid, find the
midpoint of each side and draw
a line to the opposite vertex.
Q:
I drew an equilateral triangle
and my centers were ...
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Publisher Resources

ISBN: 9780596808365Errata Page