Maths IGCSE Definitions Circle Theorems

Circle Theorems proof
angles subtended at the circumference sharing the same arc are equal
bow tie theorem
angle subtended at the centre is double the angle subtended at the circumference
arrow theorem
opposite angles of a cyclic quadrilateral are supplementary
polygon in circle theorem
the angle subtended on the diameter of a circle is always 90
right angled triangle theorem
alternate segment theorem
alternate segment theorem
two tangents from a single point are the same length.
kite theorem