Area, SM-Bank 149 A rhombus has an area of 250 square centimetres. If one diagonal measures 10 centimetres, find the length of the other diagonal. (2 marks) --- 4 WORK AREA LINES (style=lined) --- Show Answers Only \(50\ \text{cm}\) Show Worked Solution \(\text{Area of rhombus}=250\ \text{cm}^2\) \(\text{Length of diagonal:}\ x=10\ \text{m}\) \(A\) \(=\dfrac{1}{2}xy\) \(250\) \(=\dfrac{1}{2}\times 10\times y\) \(5y\) \(=250\) \(y\) \(=\dfrac{250}{5}\) \(=50\ \text{cm}\) \(\therefore\ \text{The other diagonal is }50\ \text{cm long.}\)