1. (geometry) a pair of angles that sum to 180 degrees

Encyclopedia: Supplementary angles

• self-inductance
• self-induction
• self-indulgence
• self-indulgent
• self-indulgently
• self-inflicted
• self-insurance
• self-interest
• self-interested
• self-involved
• self-justification
• self-knowledge
• self-limited
• self-loader
• self-loading
• self-locking
• self-love
• self-loving
• self-luminous
• self-made
• self-mortification
• self-moving
• self-opinionated
• self-organisation
• self-organization