Answer:
5. Statement:

Explanation:
Given, triangle STU is an equilateral triangle.

To prove that

Proof:
1. Statement:

Reason: Given in question .
2. Statement:

Reason: By using reflection proeperty of rotation.
3. Statement:
is an equilateral triangle.
Reason:
given.
4. Statement:

Reason: Sides of equilateral triangle STU.
5.

Reason: AAS congruence property of triangle.
6. Statement:

Reason: CPCT ( corresponding parts of congruence triangles).