circle theroums Flashcards
(5 cards)
1
Q
What is this rule called?
A
Angle at circumference is half the angle at the centre.
2
Q
What is this rule called?
A
Angle in a semicircle is 90 degrees.
3
Q
What is this rule called?
A
Angles in the same segment are equal
4
Q
What is this rule called?
A
Opposite angles in a cyclic quadrilateral are equal.
5
Q
What is this rule called and how do you spot it?
A
The alternate segment theorem. To spot this look for a cyclic triangle where all points lie on the circumference and one point meets a tangent.
