One side of a triangle has length 9 and a second side has length 4. Which of the following could be the area of the triangle?
I. 30
II. 20
III. 10 Pick.
A) I only B) II only C) III only D) II and III only E) I, II, and III
The triangle will have a maximum area when it is a right angled triangle   The largest triangle will be formed when 9 and 4 are the base and height of triangle .   Area = 1/2 * 9 * 4= 
<gadget id="calculator">1/2 * 9 * 4</gadget>
<output>18</output>
18   There is no lower limit on the area of any triangle whose only 2 sides are known.   Then 0 &lt; Area &lt;= 18   The answer is III only.
<result>C</result>
One side of a triangle has length 9 and a second side has length 4. Which of the following could be the area of the triangle?
I. 30
II. 20
III. 10