1. In △ABC, XY∥BC. Complete the following ratio.
AB/AX=AC/
A. AB/AX=AC/AX
B. AB/AX=AC/XY
C. AB/AX=AC/BC
D. AB/AX=AC/AY
2. Suppose a line parallel to side YZ of △XYZ intersects sides XY and XZ at points N and M, respectively. Which similarity criterion, if any, proves that △XYZ∼△XNM?
A. It cannot be proven that the triangles are similar.
B. SSS
C. SAS
D. AA
3. Suppose a line parallel to side YZ of △XYZ intersects sides XY and XZ at points N and M, respectively. Which of the following is false?
A. XN/NY=XM/MZ
B. XY/XN=XM/XZ
C. XN/NY=NM/YZ
D. XN/XY=XM/XZ
4. Given that EF∥BC, which of the following is correct?
A. ∠2=∠3
B. △AEF∼△ABC
C. AB/AE=AF/AC
D. ∠1=∠4
5. Which of the following proportions could be used to prove that RT∥PQ?
A. SP+PR/SP=SQ+QT/QT
B. SP+PR/ PR= SQ+QT/SQ
C. SP+PR/SP= SQ+QT/SQ
D. SP+QT/PR=SQ+QT/PR
1. B. AB/AX=AC/XY
2. C. SAS
3. D. XN/XY=XM/XZ
4. B. △AEF∼△ABC
5. A. SP+PR/SP=SQ+QT/QT