Indicate whether the statement is true Always. Sometimes, Never.
1. If two triangles are similar, then they are congruent.
2. If two triangles are congruent, then they are similar.
3. An obtuse triangles is similar to an acute triangle.
4. Two right triangles are similar.
5. Two equilateral polygons are similar.
6. Two equilateral triangles are similar.
7. Two rectangles are similar if neither is a square.