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As shown in the figure below, the quadrangle PQRS is divided into four parts by the diagonal line.
The area of A is 4 cm2, B is 12 cm2, C is 15 cm2.
Find the area of D.
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As shown in the figure below, the quadrangle PQRS is divided into four parts by the diagonal line.
The area of A is 4 cm2, B is 12 cm2, C is 15 cm2.
Find the area of D.