What type of lines meet to form a right angle?

• A. Parallel lines
• B. Perpendicular lines
• C. Diagonal lines
• D. Curved lines

Answer: (B)

Perpendicular lines are defined as lines that intersect at a right angle, which is an angle measuring exactly 90 degrees. When two straight lines cross each other at this precise angle, they create a distinct corner, known as a right angle. This relationship is fundamental in geometry and is crucial for various applications, including in construction, design, and navigation.

On the other hand, parallel lines never meet, regardless of their length, because they maintain a constant distance apart. Diagonal lines can form various angles depending on their orientation and are not restricted to being perpendicular. Curved lines, by their nature, do not form angles in the same sense as straight lines do; they bend continuously rather than forming distinct intersections. Thus, the unique characteristic of perpendicular lines is that they specifically create a right angle when they intersect, making them the correct answer to the question.