Circle Theorums Flashcards
1
Q
What is the circle theorum relating an angle in the centre and an angle at the circumference ?
A
the angle at the centre is double the angle at the circumference.
2
Q
A
angles in the same segment are equal.
3
Q
A
I’m a cyclical quadrilateral Every corner of the quadrilateral must touch the
circumference
of the circle.
The opposite angles in a cyclic quadrilateral add up to 180°.
4
Q
A
The angle at the
circumference
in a
semicircle
is a right angle.
5
Q
A
The angle at the
circumference
in a
semicircle
is a right angle.
6
Q
A
- The angle between a tangent and a
radius
is 90°. - Tangents which meet at the same point are equal in length.
7
Q
A
The perpendicular from the centre of a circle to a
chord bisects
the chord.
8
Q
A
The angle between a
tangent
and a
chord
is equal to the angle in the alternate segment.
