1.  Geometry 8.4 SWLT: Use Properties of Rhombuses, Rectangles, and Squares

2. Rhombus  A Parallelogram with four congruent sides  Its Diagonals are perpendicular  Since Rhombuses are Parallelograms, they have all the same properties of Parallelograms 90°

3. Rectangle AA Parallelogram with four right angles IIts Diagonals are congruent AAs with Rhombuses, Rectangles have the same properties as Parallelograms 90°

4. Squares  A Parallelogram with four congruent sides and four right angles  Its diagonals are both congruent and perpendicular 90°