# Tag: circle

- Angle at the centre of a circle is twice the angle at the circumference
- Angle in a semicircle is 90 degrees
- Angles in the same segment of a circle are equal
- Opposite angles in a cyclic quadrilateral add up to 180°
- Parts of a circle
- Perpendicular bisector of a chord
- Pi isn't about circles
- Tangent and radius of a circle meet at 90°
- Two radii form an isosceles triangle
- Two tangents from a point have equal length

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