Question

In a rectangular coordinate system, triangle ABC is drawn so that one side of the triangle connects two points on the y axis, A(0, 2) and B(0, -4). If point C has coordinates (c, 0) and the area of ABC is 21, then C =

• A. $\sqrt{53}$
• B. 7
• C. $\frac{1}{3}$
• D. 21

Answer 1

Answer: (B)

7

Answer 2

$Area=base\times\frac{height}{2}$
$21=\frac{6c}{2}$
$c=7$
The correct option is (B): 7