图中有哪些关系---**Chart/Diagram Description:** * **Type:** Geometric figure. * **Main Elements:** * A square ABCD. * Vertices of the square are labeled A (top left), B (bottom left), C (bottom right), and D (top right). * Diagonal AC is drawn from A to C. * Diagonal BD is drawn from B to D. * Point P is the intersection of the diagonals AC and BD. * Point E is on the side BC. * Point F is on the side CD. * Line segment PE connects P and E. * Line segment PF connects P and F. * A right angle symbol is shown at point P between line segment PE and diagonal BD, indicating that PE is perpendicular to BD. * A line segment connects P to C.

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