The perimeter of a rectangle is 36cm. If it is 12 cm long, find it's width
Let's use the formula for perimeter of a rectangle:
Perimeter = 2(length + width)
We know that the perimeter is 36cm and the length is 12cm, so we can substitute those values in:
36cm = 2(12cm + width)
Now we can solve for the width:
36cm = 24cm + 2width
Subtract 24cm from both sides:
12cm = 2width
Divide both sides by 2:
6cm = width
Therefore, the width of the rectangle is 6cm.
To find the width of the rectangle, we can use the formula for the perimeter of a rectangle, which is given by:
Perimeter = 2(length + width)
Given that the perimeter is 36 cm and the length is 12 cm, we can substitute these values into the formula and solve for the width.
36 cm = 2(12 cm + width)
We can simplify the equation:
36 cm = 24 cm + 2(width)
Rearranging the equation:
2(width) = 36 cm - 24 cm
2(width) = 12 cm
Dividing both sides by 2:
width = 12 cm / 2
width = 6 cm
Therefore, the width of the rectangle is 6 cm.