MathSimpler

Lines and Angles

Master the fundamentals of lines, rays, segments, and angles in geometry

📏Lines, Rays & Segments
Fundamental building blocks of geometry

Learn about straight lines, rays with one endpoint, and line segments with two endpoints.

∥Parallel Lines
Lines that never intersect

Discover properties of parallel lines and their constant distance relationships.

⊥Perpendicular Lines
Lines that form right angles

Master perpendicular lines that intersect at 90° angles and their properties.

∠Angles
Angle measurement and classification

Learn about acute, right, obtuse, straight, and reflex angles.

Interactive Tools

🧮Line Segment Calculator
Calculate how many line segments can be formed with n points on a line

Use the formula n×(n-1)÷2 to find the total number of line segments formed by n points on a straight line.

🎯Practice Questions
Test your understanding with 10 single-choice questions

Practice line properties, angle classification, and geometric principles with instant feedback and explanations.

Learning Objectives

By the end of this topic, you will:

  • ✓Distinguish between lines, rays, and line segments
  • ✓Understand parallel line properties and relationships
  • ✓Master perpendicular lines and right angles
  • ✓Classify angles by their measure
  • ✓Use angle bisectors effectively

Key Skills:

  • →Reading and drawing geometric figures
  • →Measuring angles with a protractor
  • →Identifying geometric relationships
  • →Applying geometric properties