1. The problem is to determine where to place sides and angles in geometric figures such as rectangles, parallelograms, and right triangles. 2. In a rectangle, all angles are right angles ($90^\circ$), so mark each corner with a small square to indicate this. 3. Opposite sides in rectangles are equal and parallel, so label opposite sides with the same letter or tick marks to show equality. 4. In a parallelogram, opposite sides are equal and parallel, so mark opposite sides with matching tick marks. 5. Opposite angles in a parallelogram are equal; label these angles with the same Greek letter (e.g., $\alpha$, $\beta$). 6. Diagonals in parallelograms bisect each other; mark the midpoint of the diagonal with a dot or label. 7. In right triangles, mark the right angle with a small square. 8. If a point is a midpoint of a segment, mark it and label the two segments as equal with tick marks. 9. Use consistent notation: sides with letters or tick marks, angles with Greek letters or arcs. Final answer: Place sides by marking equal lengths with matching tick marks or letters, and place angles by marking right angles with squares and equal angles with matching Greek letters or arcs.