Which of the following best completes the proof showing that ΔWXZ ~ ΔXYZ? Since segment XZ is perpendicular to segment WY, angles WZX and XZY are both right angles and congruent. The proportion _ shows the corresponding sides are proportional, so the triangles are similar by the SAS Similarity Postulate.

5 over 10 equals 5 over 2 and one half
5 over 10 equals 5 over 5
10 over 5 equals 5 over 2 and one half
10 over 5 equals 2 and one half over 5