Question

Two lines are said to be perpendicular to each other when they meet at ___ angles.

• A. ${180}^{\circ }$
• B. ${90}^{\circ }$
• C. ${60}^{\circ }$
• D. none of these

Answer 1

The correct option is B ${90}^{\circ }$

Two lines are said to be perpendicular to each other when they meet at ${90}^0$ angles.