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practice testMultiple Choice

Practice Test

Question 1 • Mathematics II

Given: line segment RT is congruent to line segment TV and line segment ST is congruent to line segment TU Prove: RSVU is a parallelogram. Open image in full-screen view What is the missing statement in step 4?

Answer
A
triangle RTS is congruent to triangle VTU and triangle RTU is congruent to triangle VTS
B
triangle VUR is congruent to triangle VUS and triangle UVS is congruent to triangle SRU
C
triangle VRS is congruent to triangle VRU and triangle USR is congruent to triangle USV
D
triangle RTS is congruent to triangle RVS and triangle RTU is congruent to triangle STV

Explanation

Since RT = TV and ST = TU, T is the midpoint of both diagonals RV and SU. The angles RTS and VTU are vertical angles, so they are congruent; the angles RTU and VTS are also vertical angles. Each pair of triangles in choice C is congruent by SAS, using the two given equal side pairs and the included vertical angles.

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