7.2 : Similar Polygons

1
7.2 Similar Polygons

• Similar polygons have
• Congruent corresponding angles
• Proportional corresponding sides
• Scale factor the ratio of corresponding sides

A
Polygon ABCDE Polygon LMNOP
L
B
E
M
P
Ex
N
O
C
D
2
If ?ABC ?RST, list all pairs of congruent
angles and write a proportion that relates the
corresponding sides.
3
Determine whether the triangles are similar.
4
A. The two polygons are similar. Find x and y.
5
If ABCDE RSTUV, find the scale factor of ABCDE
to RSTUV and the perimeter of each polygon.
6
If LMNOP VWXYZ, find the perimeter of each
polygon.