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bv fv th

ghcvyhgvl
by

Alec Wnuk

on 29 April 2010

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Transcript of bv fv th

8.4 8.4 8.4 8.4 8.4 8.4 Polygons & Angles Polygons : closed figure whose sides
are line segments that
intersect only at their
end points. there are regular and nonregular
polygons. regular non-regular NOT a polygon ANGLES! :a figure formed by two rays
that begin at a common point,
called the vertex. ray vertex the sum of an angle on a -gon is
n (n-2)*180 o a regular n-gon (n-2)*180 n o
8.5 8.5 8.5 8.5
Congruent
Polygons :similar polygons that
have the same size. congruent sides: equal lengths congruent angles:
equal measures. corresponding parts:
same positions
in different figures
8.8 8.8 8.8 8.8
Similarity
&
Dilations Similar polygons have same shape but not
same size. Dilations stretches or shrinks
a figure. the scale factor
the scale factor
of a dilation
is the ratio
of corresponding
side lengths
the center of the
dilation will always
be the orgin 2 4 4:2 2 1 2:1 = 2
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