Question

start by writing a subtraction equation you could use to find the area of the inner square.

Explanation:

Step1: Identify the areas involved

The area of the inner square can be found by subtracting the sum of the areas of the 4 triangles from the area of the outer square. So the first box should be "area of outer square", the second box should be "sum of the areas of the 4 triangles", and the third box should be "area of inner square".

Step2: Form the subtraction equation

The subtraction equation is: area of outer square - sum of the areas of the 4 triangles = area of inner square.

Answer:

area of outer square - sum of the areas of the 4 triangles = area of inner square