Supplementary Angle Solver
Calculate missing angles and explore angle relationships with our comprehensive angle calculator
Angle Information
Angle Calculation Results
Enter angle values to see their properties and relationships.
Angle Properties
Detailed angle properties will appear here.
📐 Common Angle Relationships
| Type | Definition | Sum | Example |
|---|---|---|---|
| Supplementary | Two angles that add up to 180° | 180° | 130° and 50° |
| Complementary | Two angles that add up to 90° | 90° | 30° and 60° |
| Linear Pair | Adjacent supplementary angles | 180° | Form straight line |
| Vertical | Opposite angles formed by intersecting lines | Equal | Congruent angles |
| Adjacent | Share vertex and side but no overlap | Varies | May or may not be supplementary |
Note: Angles are measured in degrees (°). Right angles are exactly 90°.
📚 Geometry Tips
Angle Identification
Look for straight lines (180°) and right angles (90°) to identify supplementary and complementary angles.
Protractor Use
Align the protractor's center with the angle vertex and baseline with one side to measure accurately.
Visual Patterns
Recognize common angle patterns like X-shapes (vertical angles) and straight lines (supplementary).
Equation Setup
For unknown angles, set up equations based on the angle relationship (e.g., x + y = 180).
Terminology
Acute < 90°, Right = 90°, Obtuse > 90°, Straight = 180°, Reflex > 180°.
Practice
Draw diagrams and solve problems regularly to build intuition about angle relationships.
Note: This calculator provides angle calculations based on standard geometric relationships. All angles are measured in degrees. Results are rounded to two decimal places for clarity.