The perimeter of this rectangle is 32cm the with is 4cm whats the length

Question

If the perimeter of a rectangle is 32cm and the width given is 4cm what else needs to be added or multiplied to get 32cm

Answer 1

Hi Nevaeh,

In order to answer your question, you need to identify the components, along with what information for those components you have.

You've noted the perimeter of a rectangle is 32cm.

You also noted the width is 4cm.

To determine the perimeter, you'd use this algebraic formula: P = 2(L+W)

Plug in the information you have, your formula now looks like this:

32 = 2(L+4)

You'll need to solve for L.

All the best...

Answer 2

The perimeter is the sum of the sides of the rectangle. There are 4 sides to your rectangle. You already know that one side is 4 cm. The opposite side of the rentangle will be the same, so 4 cm.

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4 cm | | 4 cm

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The total perimeter is 32cm. You now know that two of the sides (the width), when added together, equal 8 cm. Subtract the sides you know from the total: 32cm - 8 cm = 16 cm

Take the 16 cm and divide by 2. This will give you the length of each of the remaining sides of the rectangle.