The width of the rectangle is 2 cm, what is the length if the perimeter of the rectangle is 14 cm.

If you know the width of the rectangle and its perimeter, make up the equation.

The known perimeter formula is P = 2 * (a + b);

a is the length of the rectangle;

b is the width of the rectangle;

It is known that P = 14 cm and b = 2 cm.

Substitute the known values into the formula and get the equation.

14 = 2 * (a + 2);

Let us calculate from the equation a.

2 * (a + 2) = 14;

a + 2 = 14/2;

a + 2 = 7;

a = 7 – 2;

a = 5;

Hence, the length of the rectangle is 5 cm.

Answer: the length of the rectangle is 5 cm.