UKMT Grey Kangaroo, 2021

Geometry Difficulty 2.0 Junior Find the answer United Kingdom

In the diagram, the area of the large square is 16 cm $^2$ and the area of each small corner square is 1 cm $^2$ . What is the shaded area?

(A) $3\text{ cm}^2$ (B) $\dfrac{7}{2}\text{ cm}^2$ (C) $4\text{ cm}^2$ (D) $\dfrac{11}{2}\text{ cm}^2$ (E) $6\text{ cm}^2$

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