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# In a rectangular coordinate system, what is the area of..

tagged by: BTGmoderatorLU

### Top Member

#### In a rectangular coordinate system, what is the area of..

In a rectangular coordinate system, what is the area of a rhombus whose vertices have the coordinates (0, 3.5), (8, 0), (0, -3.5), (-8, 0)?

A. 56
B. 88
C. 112
D. 116
E. 120

The OA is A.

I'm confused with this PS question. Please, can any expert assist me with it? Thanks in advanced.

### GMAT/MBA Expert

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LUANDATO wrote:
In a rectangular coordinate system, what is the area of a rhombus whose vertices have the coordinates (0, 3.5), (8, 0), (0, -3.5), (-8, 0)?

A. 56
B. 88
C. 112
D. 116
E. 120

The OA is A.

I'm confused with this PS question. Please, can any expert assist me with it? Thanks in advanced.
Plot the four points on a Cartesian coordinate plane and measure the length of the two diagonals. Length of one diagonal = |-3.5| + 3.5 = 7, and the length of the other diagonal = |-8| + 8 = 16.

The area of the rhombus = Product of the diagonals/2 = (7*16)/2 = 56 sq unit

Hope this helps!

-Jay
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Posted:
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LUANDATO wrote:
In a rectangular coordinate system, what is the area of a rhombus whose vertices have the coordinates (0, 3.5), (8, 0), (0, -3.5), (-8, 0)?

A. 56
B. 88
C. 112
D. 116
E. 120

The OA is A.

I'm confused with this PS question. Please, can any expert assist me with it? Thanks in advanced.
Area of rhombus =half the product of diagonals
Here clearly length of digonals are 16 and 7
Therefore area = ½(16*7)= 56
Hence option A is correct

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