Answer:
1. segment RT
2. segment QS
3. segment PS
4. < QTR
5. arc QR
6. arc QSR
7. arc QS
These are all by definition.
Radius: distance from the center of a circle to a point on the circle
Diameter: a chord that goes through the center
Chord: any segment whose endpoints are on the circle
Central Angle: an angle at the center of the circle with endpoints on the circle
Minor Arc: arc that is less than 180 degrees
Major Arc: arc that is greater than 180 degrees
Semicircle: Arc of 180 degrees
