5.And the reasoning here is they both have that triple ticked side, a double ticked side, and they're both 90-degree triangles, so this follows by the 90-degree side-side-angle congruence relation.
这里的推理是它们都有三重勾边
双重勾边,并且它们都是 90 度三角形,因此遵循 90 度边角全等关系。机翻