Circles 3 Flashcards
1
Q
statement 1
A
Congruent arcs of a circle subtend equal angles at the centre.
2
Q
What is a cylic quadrilateral
A
A quadrilteral is called cylic if all 4 vertices lie in the circle.
3
Q
Theorem 7
A
Chords equidistant from the centre of a circle are equal in length.
4
Q
Theorem 12
A
If the sum of a pair of opposite angles of a quadrilateral is 180º the quadrilateral is cyclic.
5
Q
Theorem 10
A
If a line segment joining two points subtends equal angles at two other points lying on the same side of the line containing the line segment the four points lie on a circle
6
Q
Theorem 11
A
The sum of either pair of opposite angles of a cyclic quadrilateral is 180º
