can someone help me with this geometry plz??? will mark brainliest and 20 points!!

Answer:
A unique
Step-by-step explanation:
2 triangles are similar if they have the same angle measures, by the law of triangle similarity.
That means that given 2 angles measures, we can find our third angle measure and create infinitely many triangles with those 3 angles. however we have a given side length. changing the length of this will not satisfy the given conditions