Geometry: Two column proof for this.

I need a two-column proof for this asap. (Statements & its corresponding reason)

**Given**: JKLM is a parallelogram

<M is a right angle (It is read as angle M)

MJ = JK (MJ is congruent to JK)

**Prove**: Parallelogram JKLM is a square

**Illustration**:

http://i45.tinypic.com/e1b6yp.png

Appreciated. ♥

Re: Geometry: Two column proof for this.

1) JKLM is a rectangle --- if a parallelogram contains one right angle, then all other angles are right angles and its a rectangle.

2) JM = LK , LM = JK ---- Opposite sides of a parallelogram are congruents.

3) JM = JK = LM = LK ---- Transitive property

4) JKLM is a square ----- Defn of a square (4 right angles and all sides are congruent)