Studied by 6 people1
The angle at the centre of a circle is twice the angle at the circumference when both subtended by the same arc
2
Every angle subtended at the circumference of a semicircle by the diameter is a right angle
3
Angles subtended at the circumference in the same segment of a circle are equal
4
The sum of the opposite angles of a cyclic quadrilateral is equal to 180*
5
A tangent to a circle is perpendicular to the radius drawn to the point of contact
6
Tangents to a circle from an external point to the points of contacts are equal
7
The line joining an external point to the centre of the circle bisects the angle between the tangents
8
A radius bisects a chord at 90* and 0 is the centre of the circle
9
Alternate segment theorem
Note
Flashcard