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📐 Circle Angle Theorems
Major & Minor arc – full interactive toggle
1: Central angle = 2 × peripheral angle
2: Inscribed Angle Theorem (equal angles)
3: Thales' Theorem (90°)
4: Cyclic Quadrilateral
5: D at Center (A,B,C on Circle)
Radius:
Central Angle (°):
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⚡ Major Arc
🧠 Test Your Knowledge
Select a theorem and drag green points.
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