# data[].attributes.headline
Parallelogram with 4 right angles and 4 congruent sides

# data[].attributes.subject
Parallelogram with 4 right angles and 4 congruent sides

# data[].attributes.headline
All parallelograms have at least one set of parallel angles

# data[].attributes.subject
All parallelograms have at least one set of parallel angles

# data[].attributes.headline
The difference is a square is the only parallelogram with both congruent sides and angles

# data[].attributes.subject
The difference is a square is the only parallelogram with both congruent sides and angles

# data[].attributes.headline
All parallelograms add up to 180 degrees 

# data[].attributes.subject
All parallelograms add up to 180 degrees 

# data[].attributes.body
Diagonals are congruent

# data[].attributes.body
Diagonals bisect the angles and are perpendicular

# data[].attributes.body
Diagonals are congruent, perpendicular, and bisect the angles