How do you do this? never seen this before.

What is true about the dilation? it is a reduction with a scale factor between 0 and 1. it is a reduction with a scale factor greater than 1. it is an enlargement with a scale factor between 0 and 1. it is an enlargement with a scale factor greater than 1.

∆red ≅ ∆ by rule will give brainiest if possible

Which of the following is not a subset of {1,2,3}?