In this math topic, students practice calculating the area of parallelograms through the concept of equivalent rectangles. The task involves formulating area equations from provided diagrammatic representations where dimensions are encoded as linear expressions. These problems are formatted as multiple-choice questions, where each item requires the student to select the correct equation that represents the area of the parallelogram shown in the accompanying image. The focus is on reinforcing an understanding of area computation by finding the product of the base and the height of the rectangle equivalent to the parallelogram.