How to get my planes lined up?

I’m trying to project the surfaces of a tetrahedron outward such that the sides line up with the originals.
Two of the projected triangles’ sides line up, but two don’t.
I’m a beginner and finding it difficult to sort out how to rotate or line up the other two.

tetrapod flat (9.6 KB)

I’m a beginner here and any help would be most appreciated.

You just need to move the faces out along the normals.

tetrapod flat 3 (6.2 KB)

Hi Ethan,
Thanks for answering my very basic question.
Now I know what normals are for!