Area of a circle = \( \pi r^2 \), where r is the radius.<br><br>
&bull; Diameter = 10 cm, so radius = 10 ÷ 2 = 5 cm<br>
&bull; Area = \( \pi \times 5^2 = \pi \times 25 = 25\pi \)<br><br>
Final Answer: 25