Question

Write two expressions for the perimeter of a square. Explain what information is in

one of your expressions that is not in the other

Answer 1

4a=a+a+a+a= 2(a+a)=2a+2a=4a A represents one side of the square

2(a+b)=2a+2b A has two same size (#/ number) B has two same sizes (number)

Answer 2

Two expressions for the perimeter of a square are:
4a
- a represents one side of the square
a + a + a + a
- a representa one side of the square

the first expression does not include any addition. But the two expressions are actually equivalent.