Several square cards with a side length spell out a new square, write out three answers, and express the area of the new square in different ways How many square cards with side length a can make a new square? Try to write three answers and express the area of the new square in different ways. What can you find from different ways?

Several square cards with a side length spell out a new square, write out three answers, and express the area of the new square in different ways How many square cards with side length a can make a new square? Try to write three answers and express the area of the new square in different ways. What can you find from different ways?

They are 4, 9 and 16 respectively. The area is the square of 4A, 9a and 16A respectively. The rule is the square of n * a (n is an integer greater than one)