The side lengths of triangle RST are 5, 12, and 13. Which set of ordered pairs form a triangle that is congruent to triangle RST?

For choice C, the distance between (2, −1) and (7, −1) is 5 units because the points share a y-coordinate. The distance between (2, −1) and (2, 11) is 12 units because they share an x-coordinate. The third side has length √(5² + 12²) = 13, so the triangle has side lengths 5, 12, and 13. Therefore, choice C forms a triangle congruent to triangle RST.

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