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

Alt. Int. ∠'s are congruent

CPCTC

ASA

SAS

AAS

Opp. Sides are Parallel (POP)

Opp. Sides are congruent (POP)

Reflexive Property