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In the diagram above , |AD| = 10cm, |DC| = 8cm and |CF| = 15cmIf...

Mathematics
WAEC 1991
In the diagram above , |AD| = 10cm, |DC| = 8cm and |CF| = 15cmIf the area of triangle DCF = 24cm2, find the area of the quadrilateral ABCD.
  • A. 24cm2
  • B. 48cm2
  • C. 80cm2
  • D. 96cm2
  • E. 120cm2
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Correct Answer: Option B
Explanation
Area of \(\Delta\)DCF = 24cm2

Area of Quad= 2 x 24 = 48cm2
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