If you are trying to prove specific "parts" of the triangles are congruent, find a set of triangles that contains these parts and prove those triangles congruent. If the triangles you need are overlapping, try drawing the two triangles separately. It may help you and give you a better look at the known information.
In the diagram above, you can say that the shared side of the triangles (AB¯¯¯¯¯¯¯¯) is congruent because of the reflexive property. Or in other words, AB¯¯¯¯¯¯¯¯≅AB¯¯¯¯¯¯¯¯.
One way to remember the Reflexive Property is that the word “reflexive” has the same root as “reflection.”
“Reflection” should make you think of a mirror.
so like when you look in the mirror, you see yourself!
Likewise, the reflexive property says that something is equal to itself.