Circles

1. What is a circle?
2. Within a circle, what do these terms mean?
1. radius
2. chord
3. diameter
4. central angle
5. arc
6. circumference
7. area
8. sector
3. Are all diameters chords?
4. Are all chords diameters?
5. How do you calculate the circumference of a circle?
6. How do you calculate the area of a circle?
7. Rewrite Theorem 11-5 in your own words


"In a circle, a diameter bisects a chord and its arc if and only if it is perpendicular to the chord."