The diameter of the circle below is $84 \mathrm{~cm}$. Work out the radius of the circle. Not drawn accurately

Step 1 ：The diameter of the circle is given as \(84 \mathrm{cm}\).

Step 2 ：The radius of a circle is half of its diameter. So, to find the radius, we need to divide the diameter by 2.

Step 3 ：Using the formula \(\text{radius} = \frac{\text{diameter}}{2}\), we substitute the given diameter into the formula.

Step 4 ：\(\text{radius} = \frac{84}{2} = 42\)

Step 5 ：\(\boxed{\text{The radius of the circle is 42 cm}}\)