1. The area of a circle made by a chord and an arc between the two endpoints of the chord is a .

2. A part of the circumference of a circle is a .

3. The part of a circle bounded by two radii and the connecting arc of a circle is a .

4. A line that intersects a circle in two points is a .

5. Write the equation of a circle given the center and radius.

center: (4, 8)

radius: 3

6. Write the equation of a circle given the center and radius.

center: (-1, 0)

radius: square root of 5

7. Write the equation of a circle, given its diameter has endpoints of (2, ‒ 5) and (8, 3) .

8. Write the equation of a circle, given its center is at (1, 2) and it contains the point (0, 6) .