Up to this point, you should be able to prove triangles are congruent. We can now prove properties of quadrilaterals by splitting the quadrilaterals into two triangles and proving the triangles are congruent.
With flowchart proofs, keep in mind that you must first prove the triangles are congruent before proving what you really want to prove.
Rhombus: What are the properties of a rhombus? Explore the properties by creating flowchart proofs.
Parallelogram: What are the properties of a parallelogram? Explore the properties by creating flowchart proofs.