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UKMT Junior Kangaroo, 2021

Geometry Difficulty 2.0 Junior Find the answer United Kingdom

The diagram shows four congruent right-angled triangles inside a rectangle. What is the total area, in $\text{cm}^2$ , of the four triangles?

(A) $46$ (B) $52$ (C) $54$ (D) $56$ (E) $64$

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