Circle Theorems Ready to test your knowledge? Describe the circle theorem shown below. Angles in the are . Describe the circle theorem shown below. The in a is a . Describe the circle theorem shown below. The to a circle is perpendicular to the . Describe the circle theorem shown below. Two to a circle from a point are . Describe the circle theorem shown below. The angle at the is twice the angle at the . Describe the circle theorem shown below. The theorem. Describe the circle theorem shown below. Opposite angles in a quadrilateral add up to °. Describe the circle theorem shown below. The from the centre to a chord the chord. Time is Up! Time's up More?