Term
The rule for the circumference of a circle? 

Definition


Term
formula for the area of a circle? 

Definition


Term
What circle theorem does the below represent?
[image] 

Definition
Angles at the circumference are equal when subended from the same arc or chord 


Term
What circle theorem does the below represent?
[image] 

Definition
Angles at the circumference equal 90^{o} when subtended from the diameter 


Term
What circle theorem does the below represent?
[image] 

Definition
The angle from the radius to a tangent is 90^{o} 


Term
What circle theorem does the below represent?
[image] 

Definition
The lengths of two lines from the same point that are tangent to a circle are equal 


Term
What circle theorem does the below represent?
[image] 

Definition
The angle at the circumference is 1/2 the angle at the center when subtended from the same arc or chord. 


Term
What circle theorem does the below represent?
[image] 

Definition
Alternate Segment Theory. In the diagram, angles of similar colour are equal.
[image] 


Term
What circle theorem does the below represent?
[image] 

Definition
Opposite Angles in a cyclic quadrilateral add up to 180 degrees. 

