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MathematicsWAEC SSCE2008

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Earlier discussion

1 older comment kept for context.

Oluwaseun Adeyemi

From the diagram, XYZQ is a parallelogram. Thus, |YZ| = |XQ| = |PX|; \(\bigtriangleup\)PXY, Let the area of XYZQ = A1, the area of \(\bigtriangleup\)PXY


= Area of \(\bigtriangleup\)YZR = A2


Area of \(\bigtriangleup\)PQR = A = A1 + 2A2


But from similarity of triangles


\(\frac{\text{Area of PQR}}{\text{Area of PXY}} = (\frac{PQ}{PX})^2 = (\frac{QR}{XY})^2\)


\(\frac{A}{A_2} = (\frac{2}{1})^2 = \frac{2}{1}\)


A = 4A2 But, A = A1 + 2A


A1 = 4A2 - 2A2


A1 = 2A2


\(\frac{A_1}{A_2}\) = 2


A1:A2 = 2:1



Area of XYZQ:Area of \(\bigtriangleup\)YZR = 2:1