∡ Angle Calculator

Convert: Degrees ↔ Radians

Find Missing Angle in Triangle

Missing Angle

Supplementary & Complementary

Result

Angle Concepts

An angle is formed by two rays sharing a common endpoint. Angles are measured in degrees or radians.

Degrees to Radians: rad = deg × π/180
Radians to Degrees: deg = rad × 180/π
Triangle: A + B + C = 180°

Types of Angles

Acute
0° < θ < 90°
Right
θ = 90°
Obtuse
90° < θ < 180°
Straight
θ = 180°

Frequently Asked Questions

What is the complementary angle of 35°? ▼
Complementary angles add up to 90°. Complement of 35° = 90° − 35° = 55°.
What is the supplementary angle of 120°? ▼
Supplementary angles add up to 180°. Supplement of 120° = 180° − 120° = 60°.
How do you convert 90 degrees to radians? ▼
Radians = 90 × π/180 = π/2 ≈ 1.5708 radians.