If the area of the rectangle ABCD=ab sq. units, then the area of the triangle ABC is
A
12×ab sq. units
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B
14×ab sq. units
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C
18×ab sq. units
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Solution
The correct option is A12×ab sq. units For the rectangle ABCD as shown.
Area of ABCD=ab sq. units.
Now, AC is one of the diagonals. ∴ Area ΔABC=12×Area of ABCD ⇒ Area ΔABC=12×ab sq. units