Notes
angle at the circumference is half that at the centre

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Angle at the Circumference is half the Angle at the Centre

AngleAtCircumference.png

Consider a circle with a chord drawn inside it. Join the two ends of the chord to the centre of the circle and to a point on the circumference. Then the angle formed at the centre of the circle is twice the angle at the circumference.

category: circle theorems

Revised on June 24, 2021 10:44:55 by Andrew Stacey
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