In a rectangular coordinate system, what is the area of a rhombus whose vertices have the coordinates (0, 4.5), (8, 0), (0, -4.5), (-8, 0)? Pick one
A) 56  B) 72  C) 112  D) 116  E) 120
Ares of rhombus= 1/2* D1 *D2   Length of 1st diagonal = 8+8= 
<gadget id="calculator">8+8</gadget>
<output>16</output>
16   Length of 2nd diagonal= 4.5+4.5= 
<gadget id="calculator">4.5+4.5</gadget>
<output>9</output>
9   Area= 1/2*16*9= 
<gadget id="calculator">1/2*16*9</gadget>
<output>72</output>
72   72 is the answer
<result>B</result>
In a rectangular coordinate system, what is the area of a rhombus whose vertices have the coordinates (0, 4.5), (8, 0), (0, -4.5), (-8, 0)?