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Area, SM-Bank 145

Calculate the area of the following rhombus. All measurements are in metres.   (2 marks)

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\(76.44\ \text{m}^2\)

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\(\text{Length of diagonal 1:}\ x=2\times 4.2=8.4\ \text{m}\)

\(\text{Length of diagonal 2:}\ y=2\times 9.1=18.2\ \text{m}\)

\(\text{Area of rhombus}\) \(=\dfrac{1}{2}xy\)
  \(=\dfrac{1}{2}\times 8.4\times 18.2\)
  \(=76.44\ \text{m}^2\)