1. 6.3 Similar Polygons
HW pg. 376 #4­12
evens, 20­28
evens
November 17, 2014
Bellwork

2. 6.3 Similar Polygons
HW pg. 376 #4­12
evens, 20­28
evens
November 17, 2014
6.3 Similar Polygons
Similar polygons: corresponding angles are congruent and
corresponding lengths are proportional
A
B C
D E
F G
H
∴ ABCD ~ EFGH
<A ≅ <E ...
-- AB = --
BC
EF FG ...

3. 6.3 Similar Polygons
HW pg. 376 #4­12
evens, 20­28
evens
November 17, 2014
Scale Factor: ratio of lengths of corr. sides in similar polygons

4. 6.3 Similar Polygons
HW pg. 376 #4­12
evens, 20­28
evens
November 17, 2014

5. 6.3 Similar Polygons
If KLMN ~ PQRS, then KL+LM+MN+NK = KL = LM = MN= NK
HW pg. 376 #4­12
evens, 20­28
evens
November 17, 2014
Perimeters of Similar Polygons Theorem: If 2 polys are ~,
then the ratio of perimeters = the ratios of corr. side lengths
K L
N M
P Q
S R
PQ+QR+RS+SP PQ QR RS SP

6. 6.3 Similar Polygons
HW pg. 376 #4­12
evens, 20­28
evens
November 17, 2014
Similarity & Congruence: If 2 figures are ≅, then they are ~.
If 2 figures are ~, then the ratio of corr. sides = scale factor

7. 6.3 Similar Polygons
HW pg. 376 #4­12
evens, 20­28
evens
November 17, 2014
HW pg. 376
#4-12 evens,
20-28 evens