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09 Mar 2023, 09:45
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A
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
35%
(medium)
Question Stats:
70% (01:51) correct
30%
(01:55)
wrong
based on 67
sessions
History
Date
Time
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Not Attempted Yet
Note: Figure not drawn to scale
What is the area of triangle MNO in the figure above?
A. \(3\)
B. \(6\)
C. \(4 \sqrt{2} + 2 \sqrt{5} \)
D. \(2 \sqrt{10} \)
E. \(6 \sqrt{10}\)
Attachment:
2.jpg [ 15.75 KiB | Viewed 3085 times ]
01 Apr 2023, 13:45
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Bunuel
One way to solve this question would be to find the length of each side of the triangle and then find the area.
An alternative way is to imagine the triangle enclosed in a rectangle RPQN as shown below.
We can then subtract the area of \(\triangle POM\), \(\triangle RMN\), and \(\triangle OQN\) from the enclosed area of the rectangle RPQN.
Area of the rectangle = l * b = 4 * 3 = 12 sq. units
The total area of the triangles = 9 sq. units.
Area of \(\triangle MON\) = 12 - 9 = 3 sq. units
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Screenshot 2023-04-02 020330.jpg [ 95.06 KiB | Viewed 1688 times ]
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