In a rectangular coordinate system, what is the area of a rhombus whose vertices have the coordinates (0, 3.5), (7, 0), (0, -3.5), (-7, 0)?
Choose the correct choice from the following answers
A) 56
B) 88
C) 112
D) 49
E) 120
Area of rhombus= 1/2* 491 *492   Length of 1st diagonal = 7+7= 
<gadget id="calculator">7+7</gadget>
<output>14</output>
14   Length of 2nd diagonal= 3.5+3.5= 
<gadget id="calculator">3.5+3.5</gadget>
<output>7</output>
7   Area= 1/2*14*7= 
<gadget id="calculator">1/2*14*7</gadget>
<output>49</output>
49   49 is the answer
<result>D</result>
In a rectangular coordinate system, what is the area of a rhombus whose vertices have the coordinates (0, 3.5), (7, 0), (0, -3.5), (-7, 0)?