In a rectangular coordinate system, what is the area of a rhombus whose vertices have the coordinates (0, 3.5), (12, 0), (0, -3.5), (-12, 0)? Answers.
A) 84  B) 88  C) 112  D) 116  E) 120
84rea of rhombus= 1/2* D1 *D2   Length of 1st diagonal = 12+12= 
<gadget id="calculator">12+12</gadget>
<output>24</output>
24   Length of 2nd diagonal= 3.5+3.5= 
<gadget id="calculator">3.5+3.5</gadget>
<output>7</output>
7   84rea= 1/2*24*7= 
<gadget id="calculator">1/2*24*7</gadget>
<output>84</output>
84   84 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), (12, 0), (0, -3.5), (-12, 0)?