# 5.7.3. Area of a Square in Terms of Its Diagonal Length

Given that

- A
- B
- C
- D

### Example

Given that

### Solution

Step 1: Find the area of the rectangle.

Step 2: Find the area of the square.

Use the formula for the area of a square using its diagonal. The length of the square's diagonal is the same length as

Step 3: To find the area of the shaded part, subtract the area of the square from the area of the rectangle.