Put some 20 cm long and 12 cm wide rectangular paper into six layers (as shown in the figure below). What is the circumference of the figure? The figure is one on the first layer, two on the second layer, three on the third layer, four on the fourth layer, five on the fifth layer and six on the sixth layer. What is the circumference of the figure?

Put some 20 cm long and 12 cm wide rectangular paper into six layers (as shown in the figure below). What is the circumference of the figure? The figure is one on the first layer, two on the second layer, three on the third layer, four on the fourth layer, five on the fifth layer and six on the sixth layer. What is the circumference of the figure?

2 (20 × 6 + 12 × 6) = 192 + 192 = 384 (CM) a: the perimeter of the figure is 384 cm