Skills Practice Workbook - Glencoe

9–2
Similar Polygons
Skills Practice
Determine whether each pair of polygons is similar. Justify your answer.
1. 3
6 2. 2 5
3.
4
3
4
8
Yes; corresponding
angles are congruent
3 4
and � � � .
6 8
Yes; corresponding
angles are congruent
and � .
2 2
� �
5 5
4. 3
4
5. 6.
3
3
No; corresponding
angles are not
congruent.
6
8
Yes; corresponding
angles are congruent
14 14 14
and � � � � �. 26 26 26
If each pair of polygons is similar, find the values of x and y.
7. 8. 20
9.
y x
20
3
6 12
4
4
4
10. 11. 12.
11
2
2
No; � .
2 1
� �
3 5
Yes; corresponding
angles are congruent
6
and � is the ratio for
10
the lengths of all six
sides.
x � 8, y � 10 x � 30, y � 30 x � 6, y � 24
3
4 4
10
x
16
6 y
NAME DATE PERIOD
14
20
14
4
4
4
4
20
4
4
x � 8, y � 20 x � 11, y � 11 x � 15, y � 24
2
5
14
© Glencoe/McGraw-Hill 48 Geometry: Concepts and Applications
20
26
5
30
y
26
x
x
y
5
26
1
6
2
1
2 3
6
6 10
6 6 10
6
4
10
6
16
16
14
9
5
5
10
10
x
10
10
6
x
y
y
3