One side of a rectangular field is 4 m and its length along diagonal is 5 m. What is the area of the field? Options:  A) 12  B) 71  C) 17  D) 19  E) 10
lb = 3 * 4= 
<gadget id="calculator">3 * 4</gadget>
<output>12</output>
12   12nswer: 12
<result>A</result>
One side of a rectangular field is 4 m and its length along diagonal is 5 m. What is the area of the field?