1. **State the problem:** We need to find the circumference of a circle with a diameter of 16.2 cm. 2. **Formula:** The circumference $C$ of a circle is given by the formula: $$C = \pi d$$ where $d$ is the diameter. 3. **Substitute the given diameter:** $$C = \pi \times 16.2$$ 4. **Calculate the circumference:** Using $\pi \approx 3.1416$, $$C \approx 3.1416 \times 16.2 = 50.92092$$ 5. **Round to 1 decimal place:** $$C \approx 50.9$$ **Final answer:** The circumference of the circle is approximately $50.9$ cm.