Arrange the three congruent triangles so that angles one and three are adjacent to one another and angle two is adjacent angles one and three. and if you can answer the rest please

a] From the arranged angles, we notice that the triangle is right angles triangle and the corresponding angles are equal to each other. Such that the angle sizes are the same. The corresponding sides are also equal to each other because they appear to be of the same size.

b] The angles appear to form a set of triangles which are congruent to each other, this is because the corresponding angles and sides are equal.