Current location - Training Enrollment Network - Mathematics courses - In the third grade of primary school, the side length of the square increased by 5 meters, and the area increased by 135 square meters. What was the original square area?
In the third grade of primary school, the side length of the square increased by 5 meters, and the area increased by 135 square meters. What was the original square area?
Drawing observation and analysis: straighten the added part and stretch the overlapping part into a rectangle with an area of 135+5× 5 = 160.