Circle vocabulary worksheet for students to identify and name parts of a circle.

To solve the problem, we need to identify and name the parts of a circle as defined in each diagram. Let's go through each part step by step:

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1. The point in the middle of a circle is:

- This is the center of the circle.
- Answer: Center

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2. An extended chord that cuts the circle at two distinct points is:

- A chord is a line segment whose endpoints lie on the circle. When this chord is extended beyond the circle, it becomes a secant.
- Answer: Secant

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3. The line segment whose endpoints lie on the circle is:

- This is simply a chord of the circle.
- Answer: Chord

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4. The connected section of the circumference is:

- The connected section of the circumference is called an arc.
- Answer: Arc

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5. The line segment whose endpoints lie on the circle and that passes through the center is:

- This is the diameter of the circle. The diameter is the longest chord and passes through the center.
- Answer: Diameter

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6. A line that touches the circumference of a circle at a point is:

- This is a tangent to the circle. A tangent touches the circle at exactly one point.
- Answer: Tangent

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7. The line that joins the center of the circle to the outer boundary is:

- This is the radius of the circle. The radius is a line segment from the center to any point on the circumference.
- Answer: Radius

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8. A region bounded by two radii of equal length with a common center is:

- This is a sector of the circle. A sector is the region enclosed by two radii and the arc between them.
- Answer: Sector

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Final Answers:

1. Center
2. Secant
3. Chord
4. Arc
5. Diameter
6. Tangent
7. Radius
8. Sector

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Boxed Final Answer:

\[
\boxed{\text{Center, Secant, Chord, Arc, Diameter, Tangent, Radius, Sector}}
\]