Lisa is making a small box to store beads. The lid of the box is 5 cm. She wants to put a strip of velvet along the length of one side of the lid. How to find the length of the lid?

The first thing we are going to assume is that we have the perimeter of the lid, which is given by:

P = 5 cm

We will also assume that the box is square, then the lid is also square.

Therefore the perimeter is given by:

P = 4L

Where,

L: side

We cleared L:

L = P / 4

Substituting:

L = 5/4 cm

L = 1.25 cm

Answer:

the length of the lid is:

L = 1.25 cm