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Angle Calculator
About the Angle Calculator
Enter an angle in degrees to see its type, its complement and supplement, and a drawing of it.
How to use the Angle Calculator
- Enter the Angle (Degrees) or click a preset such as 30Β°, 90Β° or 145Β°.
- Press Draw Angle.
Formula and method
Acute: less than 90Β°. Right: exactly 90Β°. Obtuse: between 90Β° and 180Β°. Straight: 180Β°. Reflex: more than 180Β°. Complement = 90Β° β ΞΈ. Supplement = 180Β° β ΞΈ.
Worked example
A 30Β° angle is acute, with a complement of 60Β° and a supplement of 150Β°. A 145Β° angle is obtuse.
Tips
- Angles in a triangle add up to 180Β°.
- A full turn is 360Β°.
Frequently Asked Questions
Two angles that add up to 90Β°.