pls help i will award brainliest once i fgure it out

Answer:
2
Step-by-step explanation:
It is this because you have the side length of the triangles that are 25 and 5, which 5 x 5 is 25, then that would mean the second triangle is 1/5 of the first triangle, making it so 1/5 of 10 is 2. Hope it helps!