Geometry; 2/15

We spent time today reviewing for the chapter 7 test tomorrow.  We went through several problems together with partners before getting started on the review sheet.

Assignment:  Chapter 7 Review worksheet



Postulate for Similar Triangles

1.  RAS
2.  AC
3.  ARC
4.  AR
5.  yes, AA
6.  not similar
7.  yes, AA
8.  yes, AA
9.  not similar
10.  yes, AA
11.  x = 10.4;  y = 9
12.  x = 6.4;  y = 2.5
13.  x = 16;  y = 20

Theorems for Similar Triangles

1. SSS;  ABC similar to EFD
2.  SAS;  ACS similar to ART
3.  SAS;  ABC similar to DEC
4.  SAS;  PQR similar to SQT
5.  SSS;  JKL similar to PMN
6.  AA;  ROS similar to MTS
7.  yes
8.  a.  SNU;  b.  1:3
9.  no

Proportional Lengths

1.  yes
2.  no
3.  yes
4.  no
5.  no
6.  yes
7.  yes
8.  no
9.  6
10.  5
11.  42
12.  20
13.  14
14.  2
15.  10
16.  8

Similar Polygons

1.  x / 4y
2.  a / 5
3.  1/4
4.  8
5.  5/4
6.  4
7.  7.5
8.  x = 16;  y = 15
9.  x = 25;  y = 13.5
10.  ABC similar to EFD;  AA
11.  ABE similar to CBD;  SAS
12.  ABC similar to DFE;  SSS
13.  x = 4.2
14.  x = 14.4
15.  x = 4