In a rectangular coordinate system, what is the area of a rectangle whose vertices have the coordinates (-7, 1), (1, 1), (1, -6) and (-7, -6)?
Options:
A) 112
B) 64
C) 42
D) 24
E) 56
Length of side 1= 7+1= 
<gadget id="calculator">7+1</gadget>
<output>8</output>
8   Length of side 2= 6+1= 
<gadget id="calculator">6+1</gadget>
<output>7</output>
7   Area of rectangle= 7*8= 
<gadget id="calculator">7*8</gadget>
<output>56</output>
56   56 is the answer
<result>E</result>
In a rectangular coordinate system, what is the area of a rectangle whose vertices have the coordinates (-7, 1), (1, 1), (1, -6) and (-7, -6)?