Question

A rectangle has dimensions of 3a by 5b. How do you write simplified expressions for the area and perimeter of this rectangle?

Answer 1

`area = 15ab` and `Perimeter = 6a+10b`

Explanation:

Write expressions for the area and perimeter using the variables, in exactly the same way as with numbers. However, it is not possible to get a final numerical answer.

`Area = l xx b " " Area = 3a xx 5b = 15ab`

Perimeter is the sum of all the sides of a shape.

`Perimeter = l +b+l+b`

`P = 3a+5b+3a+5b =6a+10b`