How would I go about solving this?

Answer:
AAS
this should be it because both have the equal angles and a side
Answer:
AAS
Step-by-step explanation:
You are given two triangles. Both have angles of 30° and 70° and congruent nonincluded sides of 10 units.
The Angle Angle Side postulate (AAS) states that if two angles and the non-included side of one triangle are congruent to two angles and the non-included side of another triangle, then these two triangles are congruent.
Hence, you can use AAS postulate