Hi, Carola.

Lesson 73 has a review of parallelograms and rhombuses. There is a Note box on page 149 that says, 'The common name of rhombus is diamond'. There is also another note on page 148 that says, 'A parallelogram by definition is a 4-sided figure with 2 sets of parallel lines. I point that out because sometimes I forget to look at the note boxes!!!! :-)

I hope that helps!
Rachel

Yes, that helps. Thank you.