GCSE Maths Practice: circle-theorems

\( \begin{array}{l}\text{Which of the following are true about tangents to a circle?}\end{array} \)

Select all correct options:

\( \text{Tangents from the same external point are equal in length} \) \( \text{A tangent is perpendicular to the chord} \) \( \text{A tangent touches the circle at exactly one point} \) \( \text{A tangent crosses the circle} \)