The text in the image appears to be a math problem in Japanese. Here's a translation:

Problem: Two right-angled isosceles triangles, $\triangle_1$ and $\triangle_2$, have legs of length 1. The base length of $\triangle_2$ is also 1, while the remaining two sides are equal in length. How can you determine the relationship between $\triangle_1$ and $\triangle_2$?

The equation at the bottom seems to show a comparison between the two triangles:
$\Delta_1 = \text{SA}\pm(2) \Delta_2$

It seems like a geometric comparison is being made between these two triangles.

Would you like to go over the details of this problem or break it down step by step?