NCERT · Class 6 · Mathematics · Understanding Elementary ShapesWhen two lines intersect and the angle between them is 90 degrees, the lines are said to be:
Step-by-Step Solution
Lines that intersect at right angles (90 degrees) are called perpendicular lines.
Detailed Options Breakdown
Option : Parallel lines
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Understanding Elementary Shapes.
Option 1: Perpendicular lines (Correct Answer)
Correct choice. Refer to the step-by-step verified solution guidelines above for details.
Option 2: Intersecting lines only
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Understanding Elementary Shapes.
Option 3: Curved lines
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Understanding Elementary Shapes.
💡 Study Guide: This question tests core syllabus concepts from Understanding Elementary Shapes. For formulas, key summaries, and mock exam reference guides, read the full Understanding Elementary Shapes Revision Notes.