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imaboredpandagirl

Answer:

54 units²

Step-by-step explanation:

The area of the entire square is 81 units^2 (9*(5+4))

The bottom-left triangle has an area of 6 units^2 ((4*3)/2)

The bottom-right triangle has an area of 10 units^2 ((5*4)/2)

81-(6+10)=65

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