Question

In the figure below, is any side of ΔABC parallel to X-axis? If so, the side is:

• A. BC
• B. AC
• C. AB
• D. none of these

Answer 1

The correct option is A

BC

Any line with a constant value of the y-coordinate will be parallel to the X-axis. Observe that B
and C have the same y coordinate, $c$, and hence this side $BC$ is parallel to the X-axis. Similarly, $A$ and $B$ have the
same x – coordinates, $-a$, hence this side is parallel to the Y-axis.