Question

The straight lines $\frac{x-1}{1}=\frac{y-2}{2}=\frac{z-3}{3}$ and $\frac{x-1}{1}=\frac{y-2}{2}=\frac{z-3}{3}$ are :

• A. Parallel lines
• B. Intersecting at ${60}^o$
• C. Skew lines
• D. Intersecting at right angle

Answer 1

The correct option is D Intersecting at right angle

The given straight line $\frac{x-1}{1}=\frac{y-2}{2}=\frac{z-3}{3}and,\frac{x-1}{1}=\frac{y-2}{2}=\frac{z-3}{3}$ are intersecting at right angle because by solving it with matrix method we get $0$.

Hence, the option $D$ is the correct answer.