Final answer:
The question asks to identify congruent parts within a square, which includes all sides being equal in length and all angles being right angles.
Step-by-step explanation:
The question concerns a geometric figure, specifically a square, and involves identifying congruent parts within geometric shapes and potentially related to different geometric problems. In geometry, congruent means that figures have the same size and shape.
In the case of a square ABCD, all four sides are congruent (AB = BC = CD = DA), and all four angles are congruent as they are all right angles (90 degrees).
Furthermore, the diagonals of the square (AC and BD) are also congruent, and they bisect each other at right angles. Matching congruent parts is vital for solving various geometrical problems or puzzles, like determining areas, angles, or other relationships within a figure.