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I need help with his assignment ASAP!!!?

5. Perform these transformations on ∆TRL and compute the perimeter of the pre-image and final image.
a. Rotate ∆TRL 180° about the origin and label the resulting image ∆T’ R’ L’.
b. Reflect ∆T’ R’ L’ across the y-axis and label the resulting image ∆T’’ R’’ L’’.
c. Translate ∆T’’ R’’ L’’ according to (x, y) (x + 3, y – 3) and label the image ∆T’’’ R’’’ L’’’.
Answer:

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2. Provide the reasons for the proof.
Given: RUMH is a rhombus.
RUBM is a rhombus.
Prove-