What additional information is needed to prove the triangles are congruent by the SAS Postulate?

http://i.imgur.com/4WUJKOw.png

Question

What additional information is needed to prove the triangles are congruent by the SAS Postulate?

http://i.imgur.com/4WUJKOw.png

directrix · Answer

Choose an option that would cause the purple-marked angles congruent.

Segment WY is congruent to itself by the reflexive property.

You have two pairs of sides congruent of the two triangles. 

Now, you need to get the angles between those sides congruent.

@asadstep

anonymous · Answer

It would be C? WY = WZ.

directrix · Answer

No, you need a pair of angles with vertex at the point Y.

directrix · Answer

The angle pairs in the options do not have vertex Y.

So, look for a statement that would cause the angles with vertex Y to be congruent.

directrix · Answer

What kind of angles are formed if segment WY is perpendicular to segment XZ?

directrix · Answer

@asadstep