Question

△RST is mapped to △R′S′T′ using each of the given rules.

For which rules is △RST congruent to △R′S′T′?



Select each correct answer.

A) (x, y)→(−x, y)

B) (x, y)→(−x, −y)

C) x, y)→(x, y−7)

D) (x, y)→(−7x, −7y)

E) (x, y)→(0.07x, 0.07y)

Answer 1

We are given two triangles △RST and △R′S′T′. We are to determine which of the following choices are both triangles congruent to each other. The only choice which is true in this case is:

E) (x, y)→(0.07x, 0.07y)

This is possible since if we look at the coordinates of the second set of points, we can conclude that the scale factor used is 0.07.