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3. A polygon is a shape that has any
number of straight sides connected at
vertices(corners).
A triangle is a 3 sided polygon.
A square is a 4 sided polygon.
4. Polygons are similar when...
Two polygons have equal
corresponding angles
and
The corresponding sides are proportional
We have already studied a special case
of similar polygons
Similar triangles
6. Which of the following are similar polygons??
10
6
5
8
A 5 B 4 C
7. H
A
0
95
0
E
95 L
0
0
160 0
B 0
100
I 100 160
0
115
D
0
0
115
70 K
C 0
70
Name all of the corresponding angles J
Set up proportions of all corresponding sides
8. Find the missing side HL
H
0
A 2.25 95
2.2 L
1.5 95
0 0
0
0
E
I 100 160 2.4
B 100
0
160 1.6
0 0
115
D 115
K
3
70
0
4.5
2.5 0
C 70 3.75
J
9. Find the missing sides HL, JK, BC, DE
L
A 0 2.4
0.75 H
B 0 0
95 0
16 0
10
0 0 1 95 5 K
2.25 11
16 0 E 0
0
0
11
10
5 0
70 0
D
I 0
C
2.7 4 70
J
