Question

He width of a rectangle is w cm.

The length is 3 cm more than the width.
a Write down a formula for the area, a cm2, in terms of w.
b Write down a formula for the perimeter, p cm, in terms of w.

Answer 1

If the width of a rectangle is equal to wcm, and the length is 3cm more than the width, we can use this equation to solve for the area:

(Let 'a' = area and 'p' = perimeter)

• (w+3) × w = a

To solve for the perimeter, we can use this equation:

• [(w+3) × 2] + (w × 2) = p

Therefore, the equations you can use to solve for the area and perimeter are (w+3) × w = a and [(w+3) × 2] + (w × 2) = p