In a rectangular coordinate system, what is the area of a rectangle whose vertices have the coordinates (-3, 1), (1, 1), (1, -2) and (-3, -2)? Choose the correct choice from the following answers
A) 12
B) 24
C) 20
D) 30
E) 36
Length of side 1= 3+1= 
<gadget id="calculator">3+1</gadget>
<output>4</output>
4   Length of side 2= 2+1= 
<gadget id="calculator">2+1</gadget>
<output>3</output>
3   12rea of rectangle= 4*3= 
<gadget id="calculator">4*3</gadget>
<output>12</output>
12   12 is the answer
<result>A</result>
In a rectangular coordinate system, what is the area of a rectangle whose vertices have the coordinates (-3, 1), (1, 1), (1, -2) and (-3, -2)?