Area, SM-Bank 119 Calculate the area of a semi-circle with a diameter of 60 centimetres. Give your answer correct to one decimal place. (2 marks) --- 4 WORK AREA LINES (style=lined) --- Show Answers Only \(1413.7\ \text{cm}^2\ (1 \text{ d.p.})\) Show Worked Solution \(\text{Diameter}=60\ \text{cm}\) \(\therefore\ \text{Radius}=30\ \text{cm}\) \(\text{Area semi-circle}\) \(=\dfrac{1}{2}\times \pi r^2\) \(=\dfrac{1}{2}\times \pi\times 30^2\) \(=1413.716\dots\) \(=1413.7\ \text{cm}^2\ (1 \text{ d.p.})\)