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505-555 (Easy)|   Geometry|      
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Bunuel
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In the figure shown, what is the value of x? 26 Mar 2018, 23:25
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15% (low)

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88% (00:58) correct 12% (01:25) wrong based on 69 sessions

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In the figure shown, what is the value of x?


(1) a = b = 4

(2) \(c = 4\sqrt{2}\)


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2018-03-27_1023.png
2018-03-27_1023.png [ 8.26 KiB | Viewed 2799 times ]
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Bunuel
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In the figure shown, what is the value of x? 26 Mar 2018, 23:26
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Bunuel

In the figure shown, what is the value of x?


(1) a = b = 4

(2) \(c = 4\sqrt{2}\)


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2018-03-27_1023.png
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23. Geometry




24. Coordinate Geometry




25. Triangles




26. Polygons




27. Circles




28. Rectangular Solids and Cylinders




29. Graphs and Illustrations



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In the figure shown, what is the value of x? 27 Mar 2018, 00:10
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Bunuel

In the figure shown, what is the value of x?


(1) a = b = 4

(2) \(c = 4\sqrt{2}\)


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2018-03-27_1023.png
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From the image we know that 3 angles of the quadrilateral on the right are 90deg .. so it is a rectangle & it can be a square if adjacent sides are equal
Also the triangle to the left is a right angled triangle.

We need to find x which is the sum of lengths of the base of the triangle and side of the rectangle.

(1) a = b= 4 meaning.. adjacent sides of rectangle are equal in length! It is a square. Not sufficient as we know nothing about the triangle except for one angle ( 90 deg) and one side ( 4 - side common with the square)

(2) \(c = 4\sqrt{2}\) Not sufficient as we do not know the base of the triangle or anything about the rectangle to the right.

(1) + (2) together ... We know the base of the square is 4 in length.. & .. from Pythagoras theorem we can find the base of the triangle. Sufficient!

Hence Option C is correct.
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In the figure shown, what is the value of x? 27 Mar 2018, 00:26
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Attachment:
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2018-03-27_1023.png [ 12.24 KiB | Viewed 2490 times ]

In the figure shown, what is the value of x?

(1) a = b = 4
If a = b = 4, PQRS has to be a square. Here, RS = 4.
But, we have no idea about the length of TR (Insufficient)

(2) \(c = 4\sqrt{2}\)
With the information c = \(4\sqrt{2}\), we can't determine
the value of TR. Also, we have no information about RS (Insufficient)

When we combine the information from both the statements,
PR = 4(because PR is the side of a square) and the right triangle
has to be an isosceles right-angled triangle. Therefore, TR = \(4\sqrt{2}\)
The value of x = RS + TR = 4 + \(4\sqrt{2}\) (Sufficient - Option C)
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