In a rectangular coordinate system, what is the area of a rhombus whose vertices have the coordinates (0, 3.5), (9, 0), (0, -3.5), (-9, 0)? Choose the correct choice from the following answers:
A) 56	B) 88	C) 112	D) 116	E) 63
Area of rhombus= 1/2* D1 *D2   Length of 1st diagonal = 9+9= 
<gadget id="calculator">9+9</gadget>
<output>18</output>
18   Length of 2nd diagonal= 3.5+3.5= 
<gadget id="calculator">3.5+3.5</gadget>
<output>7</output>
7   Area= 1/2*18*7= 
<gadget id="calculator">1/2*18*7</gadget>
<output>63</output>
63   63 is the answer
<result>E</result>
In a rectangular coordinate system, what is the area of a rhombus whose vertices have the coordinates (0, 3.5), (9, 0), (0, -3.5), (-9, 0)?