Parallelogram Proofs

Is the quadrilateral a parallelogram? If yes, state how you know.

• Opposite sides equal

• Opposite sides parallel

• Diagonals bisect each other

• Not enough info

Is the quadrilateral a parallelogram? If yes, state how you know.

• Opposite sides parallel

• Opposite sides equal

• Opposite sides parallel and equal

• Not enough info

Is the quadrilateral a parallelogram? If yes, state how you know.

• Opposite sides parallel and equal

• Opposite sides equal

• Opposite angles equal

• Not enough info

Is the quadrilateral a parallelogram? If yes, state how you know.

• Opposite sides equal

• Diagonals bisect each other

• Opposite angles equal

• Not enough info

Is the quadrilateral a parallelogram? If yes, state how you know.

• Opposite sides parallel

• Opposite sides equal

• Opposite sides parallel and equal

• Not enough info

Is the quadrilateral a parallelogram? If yes, state how you know.

• Opposite sides parallel

• Opposite angles equal

• Opposite sides equal and parallel

• Not enough info

Is the quadrilateral a parallelogram? If yes, state how you know.

• Opposite sides parallel

• Opposite sides equal

• Opposite sides parallel and equal

• Not enough info

Is the quadrilateral a parallelogram? If yes, state how you know.

• Opposite angles equal

• Diagonals bisect each other

• Opposite sides parallel

• Not enough info

Is the quadrilateral a parallelogram? If yes, state how you know.

• Opposite angles equal

• Opposite sides parallel

• Opposite sides equal

• Not enough info

Complete the reasons for the proof to the right. USE WHITEBOARDS & LABEL!!!!

e

f

g

h

d

AAS

Reflexive Property

ASA

CPCTC

SAS

Opp. Sides are congruent (POP)

Opp. Sides are Parallel (POP)

Alt. Int. ∠'s are congruent