To find the length of the diagonal AB:

You would first use on the bottom of the box rectangle to find the diagonal CB =

Then use CB as of the triangle ACB, with AB being .

AB is approximately =

Word Bank:
5 cm the perimeter formula for a rectangle13 cm3 cm89 cm73 cm square root 7 cm the Pythagorean Theorem the area formula for a rectangle 11 cm the hypotenuse a leg

To find the length of the diagonal AB, we need to follow a step-by-step process.

Step 1: Use the perimeter formula for a rectangle.
The perimeter of a rectangle equals twice the sum of its length and width. However, in this case, we are only provided with the widths of the rectangle sides (CB and AB), so we can't directly calculate the perimeter. Therefore, we'll need to use another method.

Step 2: Use the Pythagorean Theorem.
The Pythagorean Theorem states that in a right-angled triangle, the square of the hypotenuse is equal to the sum of the squares of the other two sides. In this case, triangle ACB is a right-angled triangle, and CB is one of its legs. So, we can use the Pythagorean Theorem to find the length of CB.

Step 3: Finding CB using the Pythagorean Theorem.
Given the width CB of the rectangle, we can find its length by using the Pythagorean Theorem. Let's assume the length of CB is x cm. Then, according to the Pythagorean Theorem:
x^2 = 3 cm^2 + 5 cm^2
x^2 = 9 cm^2 + 25 cm^2
x^2 = 34 cm^2

To isolate x, we take the square root of both sides since we are looking for a length, not an area:
x = √(34 cm^2)
x ≈ 5.83 cm

Step 4: Find AB using the length CB.
Now that we have the length CB ≈ 5.83 cm, and AB represents the hypotenuse of the right-angled triangle ACB, we can use it as one of the triangle's legs and apply the Pythagorean Theorem to find the length of AB.

Let's assume the length of AB is y cm. Then, according to the Pythagorean Theorem:
y^2 = 5.83 cm^2 + (AB)^2 [We use AB^2 since AB is the unknown we are solving for here]

To solve for AB, we need one more piece of information or equation. Without any further details about the triangle or rectangle, it is not possible to determine the length of AB.