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More Lessons for GCSE Maths

Math Worksheets

Videos to help GCSE Maths students learn the circle theorems.

Circle Theorems 1

The angle at the centre is twice the angle at the edge for configurations with intersecting lines.

The angle in a semi-circle is always 90 degrees.

Angles in the same segment are equal. (Bow theorem)

Opposite angles in a cyclic quadrilateral add up to 180 degrees

The Alternate Segment Theorem

The angle between a tangent and a chord is equal to the angle in the alternate segment.

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