A visual summary of the main circle theorems, with one diagram per slide: the angle at the centre is twice the angle at the circumference, angles in the same segment are equal, opposite angles in a cyclic quadrilateral add up to 180 degrees, tangents from a point are equal, the alternate segment theorem and the angle in a semicircle.
What this presentation covers
- angle at the centre is twice the angle at the circumference
- angles in the same segment are equal
- opposite angles of a cyclic quadrilateral
- tangents from an external point
- the alternate segment theorem
- the angle in a semicircle is 90 degrees
Level: GCSE
Slides: 8
Format: PowerPoint (.pptx)
Contributed by: Jim Randle