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CalcVerse📐 GeometryAngle Relationships
📐

Angle Relationships

Complementary, supplementary & vertical angles

Grades 7–8

📐 Angle Relationships Solver

°

✅ Acute angle — all 4 relationships apply!

45°135°45°135°

đŸ”ĩ Complementary

Two angles that add up to 90°

90° − θ

45°

đŸŸŖ Supplementary

Two angles that add up to 180°

180° − θ

135°

🟡 Vertical

Opposite angles formed by two intersecting lines — always equal!

θ

45°

đŸŸĸ Alternate Interior

When a transversal crosses parallel lines — equal angles on opposite sides

θ (parallel lines)

45°

💡 Remember: Vertical angles are ALWAYS equal. Supplementary angles ALWAYS add to 180°. Complementary angles ALWAYS add to 90°.