Hawkins’ first theorem was suggested by a triplet of crop circles discovered on June 4, 1988, at Cheesefoot Head. Hawkins noticed that he could draw three straight lines, or tangents, that each ...

Circle theorems are properties that are true for all circles, regardless of their size. There are six theorems to learn and recognise. Questions can have a combination of theorems. It is important ...

Solution: All 4 vertices touch the circumference of the circle. Using theorem 4. Opposite angles in a cyclic quadrilateral add up to 180° a = 180 – 60 = 120° b = 180 – 140 = 40° ...