Question

l = 8, w = 4, h = 2

Answer 1

Find the diagonal (d) of the base.

Answer 2

You need d in the figure below.

Answer 3

Let's look at the base from the top.

Answer 4

The diagonal of the base is the hypotenuse of a right triangle.

You need to use the Theorem of Pythagoras:

\(a^2 + b^2 = c^2\)

In your case, use

\(l^2 + w^2 = d^2\)

Solving for d, you get:

\(d = \sqrt{l^2 + w^2} \)

Just use the length and width given for \(l\) and \(w\) in the formula above, and calculate \(d\).