Cases of word usage

1) a part of the edge of a circle or other curved line (arc)

2) moving in a circle or curve to face the opposite way (around)

3) a straight line that joins two points on the circumference of a circle or the ends of an arc (chord)

4) a journey round a circle or closed route (circuit)

5) a line that marks out a circle or other curved figure (circumference)

6) a line of which no part is straight, e.g. part of the edge of a circle (curve)

7) (a measurement of) a straight line drawn from side to side through the center of a circle (diameter)

8) a circle of flowers or leaves used as an ornament or decoration or as a prize for victory etc (garland)

9) (of the moon) having the bright part greater than a semicircle and less than a circle (gibbous)

10) a circle of light round the sun or moon (halo)