In a rectangular coordinate system, what is the area of a rhombus whose vertices have the coordinates (0, 3.5), (6, 0), (0, -3.5), (-6, 0)? Choose the correct choice
A) 42  B) 56  C) 88  D) 112  E) 116
42res of rhombus= 1/2* D1 *D2   Length of 1st diagonal = 6+6= 
<gadget id="calculator">6+6</gadget>
<output>12</output>
12   Length of 2nd diagonal= 3.5+3.5= 
<gadget id="calculator">3.5+3.5</gadget>
<output>7</output>
7   42rea= 1/2*12*7= 
<gadget id="calculator">1/2*12*7</gadget>
<output>42</output>
42   42 is the answer
<result>A</result>
In a rectangular coordinate system, what is the area of a rhombus whose vertices have the coordinates (0, 3.5), (6, 0), (0, -3.5), (-6, 0)?