Triangle rst was transformed using the rule (x, y) → (–x, –y). the vertices of the triangles are shown. r (1, 1) s (3, 1) t (1, 6) r' (–1, –1) s' (–3, –1) t' (–1, –6) which best describes the transformation? the transformation was a 90° rotation about the origin. the transformation was a 180° rotation about the origin. the transformation was a 270° rotation about the origin. the transformation was a 360° rotation about the origin.

Just took the test the answer is 180 degrees.

- The transformation was a 180° rotation about the origin.

Explanation :-

In the given question we can see that ΔRST was transformed using the rule (x, y) → (–x, –y), such that the vertices of the triangles are R (1, 1) S (3, 1) T (1, 6)  and R' (–1, –1) S' (–3, –1) T' (–1, –6). Thus the transformation must be a 180° rotation about the origin.

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