semicircle, central ,angle ,major arc ,radius, diameter, inscribed angle ,minor arc ,chord
1. It is an angle whose vertex is the center of the circle and with two radii as its sides _
2. It is a segment joining any two points on the circle
3. It is the longest chord and it is twice the measure of the radius
4. It is an angle whose vertex is on the circle and whose sides contain chords of the circle
5. It is an arc of a circle that measures greater than the semicircle 6. It is an arc of a circle that ineasures less than the semicircle 7. It is half the measure of the diaineter 8. It is an arc measuring one-half the circumference of a circle 4​