Question

Which transformations preserve congruence?

1 . dilations when scale factor is greater than 1 or between 0 and 1
2 . dilations with a scale factor of 1
3 . reflections
4 . rotations
5 . translations

Answer 1

2 . dilations with a scale factor of 1

3 . reflections

4 . rotations

5 . translations

Explanation:

2 . dilations with a scale factor of 1

3 . reflections

4 . rotations

5 . translations

Answer 2

2, 3 ,4 ,5

Explanation:

3, 4,5 they are not changing the size of the shape but the position.

2 is just multiplying by 1 so the size stays the same

1 is multiplying by a scale factor of anything other than 1 so the size changes