2. WXZ=YXZ
3. Reflexive property of equality
(if they are angles)-
4. WXZ=YXZ ~~Reason- Congruent angles have equal number of degrees
(if they are triangles-more likely judging by the problem)-
4. Triangle WXZ=YXZ ~ Reason- SAS Congruence Postulate
Answer:
The explanation is given below with the diagram.
Step-by-step explanation:
Given:
Δ ABC is an Isosceles triangle with base AB.
D is the midpoint of AB
∴ AD = BD
To Prove:

Proof:
Isosceles triangle property:
If Δ ABC is an Isosceles triangle with base AB, then the two sides are congruent and the base angles are congruent.



Answer:
This expression can be simplified to 1
Step-by-step explanation:

The answer is B :)
Have a nice day