Question

the angle formed at the center of a circle by two radii is called a ______ angle.
a line that intersects a circle at exactly one point is called a ______ line.
the total distance around the circle is known as the ______.
a line that intersects a circle in exactly two points is called a ______ line.
the fixed point equidistant from all points on the circle is called the ______.
the part of a circle enclosed by two radii and an arc is called a ______.

Explanation:

1. By definition, the angle formed at the center of a circle by two radii is a central angle.
2. A line that intersects a circle at exactly one - point is a tangent line.
3. The total distance around the circle is the circumference.
4. A line that intersects a circle in exactly two points is a secant line.
5. The fixed point equidistant from all points on the circle is the center.
6. The part of a circle enclosed by two radii and an arc is a sector.

Answer:

1. central
2. tangent
3. circumference
4. secant
5. center
6. sector